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 FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info

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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyTue Mar 20, 2007 8:44 am

Thanks to Jason, nothincame2mind, and Jelorian.

Wheel/Tire Size Comparer:

http://www.wheelsmaster.com/rt_specs.jsp

or:

http://www.rimsntires.com/specs.jsp

Tire Size Calculators:

http://mcgrefer.com/sizeinfo/
http://www.miata.net/garage/tirecalc.html

Wheel Bolt Pattern Cross Reference:

http://www.roadkillcustoms.com/hot-rods-rat-rods/Wheel-Bolt-Pattern-Cross-Reference-Database.asp

Lug Bolt Pattern Chart (dead link):

http://www.willysoffroadsupply.com/Wheel_Spacer_Chart.html?sid=f816d06972c62f3471cd1bdd3169e9b0

Other links that could be useful?.. please post 'em.


Last edited by AA on Tue Oct 20, 2015 6:30 pm; edited 9 times in total
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySun Apr 15, 2007 10:43 pm

3D Wheel Visualizer (Includes Riviera):

http://www.wheelenvizio.com/?wheel=Envizio
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyFri May 11, 2007 2:56 am

RIVIERA 86-89 14 X 6 5X115 12mmX1.5 70.3
RIVIERA 93-on 15 X 6 5X115 12mmX1.5 70.3
RIVIERA FWD 79-85 15 X 7 5X120.7 12mmX1.5 70
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyTue Jun 26, 2007 11:36 am

This is real helpful.......Thanks!
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyTue Aug 28, 2007 1:20 pm

AA wrote:
Thanks to Jason and nothincame2mind.

Wheel/Tire Size Comparer:

http://www.wheelsmaster.com/rt_specs.jsp

Tire Size Calculator:

http://www.miata.net/garage/tirecalc.html

Lug Bolt Pattern Chart:

http://www.willysoffroadsupply.com/Wheel_Spacer_Chart.html?sid=f816d06972c62f3471cd1bdd3169e9b0

Other links that could be useful?.. please post 'em.


Do you know what the offset is for the 6.5" wide chrome rims (Riv stock rims)?

Thanks,
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyTue Aug 28, 2007 10:03 pm

dont quote me, but i think it is around +32 offset

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Dsc_0110
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Oct 17, 2007 6:41 pm

Anyone know the offset for the stock 16x7 wheels?
would a +40 make a huge difference from a +30 for example?
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Oct 17, 2007 7:31 pm

i think it is like +32 or +35 depending on wheel.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Dsc_0110
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: dimensions   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySun Apr 06, 2008 10:37 pm

what are the dimensions to the 1996 stock wheels. what by what
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySun Apr 06, 2008 10:40 pm

16x7 i believe.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySun Apr 06, 2008 11:33 pm

the 8 spokes are 16x6.5 and the 12 spokes are 16x7
all run 225/60/16 tires and have +32 offset i believe
to me the 12 spokes are "stock" since they are the rims specifically for the riv, while the 8 spoke design was offered on other buicks as well. the base wheels are ugly mono wheels with lots of little spokes around the edge, but those were only put on 95/96's with no s/c or other options.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Dsc_0110
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyThu Apr 17, 2008 6:56 pm

okiedrifter wrote:
RIVIERA 86-89 14 X 6 5X115 12mmX1.5 70.3
RIVIERA 93-on 15 X 6 5X115 12mmX1.5 70.3
RIVIERA FWD 79-85 15 X 7 5X120.7 12mmX1.5 70

The one that says 93-on, is that correct?
Aren't our rims 16 x 6.5 or 16 x 7.0?
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyThu Apr 17, 2008 7:42 pm

jrocha wrote:
okiedrifter wrote:
RIVIERA 86-89 14 X 6 5X115 12mmX1.5 70.3
RIVIERA 93-on 15 X 6 5X115 12mmX1.5 70.3
RIVIERA FWD 79-85 15 X 7 5X120.7 12mmX1.5 70

The one that says 93-on, is that correct?
Aren't our rims 16 x 6.5 or 16 x 7.0?

i dont know why it says 93-on for that size b/c ours (95-99) are 16X6.5 for 8 spoke design, or 16X7 for 12 spoke design still 5x115 bolt pattern.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Dsc_0110
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySat Jun 28, 2008 8:14 pm

..I'm pretty sure our bolt pattern is 5x115
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptySat Jun 28, 2008 8:16 pm

With an adaptor, but not with the stock bolt pattern:

Link



Last edited by Jack the R on Mon Dec 22, 2014 10:58 pm; edited 1 time in total
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Rim centerbore specs   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Sep 16, 2009 4:12 pm

Was just trying to verify the specs on the KMC Gnomes I picked up earlier this year, and did some measuring. I found the centerbore is 1/16" bigger diameter than the stock rims, and suspected that was the case when I installed them, they seemed a bit loose. However, the studs and lugnuts seemed to center pretty well when I tightened things up carefully. However, I've found online info that "lug-centric" (as opposed to "hub-centric") wheels need to be torqued down with the tires OFF the ground, to ensure the lugnuts remain exactly centered while torquing. I know I tightened them pretty good off the ground, but had them on the ground for final tightening. I suspect this could be part of my tire road noise issue with these Yokohama tires. Another factor could be that I've been running them on the low side pressure-wise, due to higher wear in the center of the tread prior to my purchase. Lower pressure, means the outside edges wear faster, and I'm thinking that could result in the tire noise from the outside treads as the center section has less pressure on it. Any feedback or comments?

I'm thinking these dual-pattern rims may have been ordered for a non-Riv application that has a slightly larger centerbore. If ordered for a Riviera, there may have been a centering ring added to the wheels. The 2nd bolt pattern is slightly smaller than the Riv's. But I can't find any markings on the rim that indicate what the 2 bolt patterns actually are. It's even possible they could be 114.3mm pattern, with the 2nd being smaller yet. I know a lot of guys run a 114.3 on their 115mm BP cars successfully, but I don't know if you can tell the diff while you're installing them.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Sep 16, 2009 4:32 pm

You can probably get a centering ring for this, contact KMC to see if they make one. I would suggest using one, I don't like lug-centric rims.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Sep 16, 2009 4:48 pm

If you find the spec's for our hubs while doing your search could you post them here for future reference. I know our wheel / hub / lug spacing size is 115 mm, but I don't know how the centering rings are measured and sold.
Thanks.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyWed Sep 16, 2009 10:33 pm

I measured our stock centerbore, but don't recall what it was. Not expecting to pull a wheel anytime soon, unless I remove the RR to snap a pic of the wheelhouse repair.

I'll make a point of contacting KMC before I get around to slapping them back on next spring. I also do not like the centerbore not being correct. What baffles me is that there are no clear markings to indicate what the 2 bolt patterns are on these.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 10:06 am

If our bolt pattern isn't 5x115, then what is it? (above link doesn't work).

Has anyone determined for sure what the stock offset is? Is it +32 mm?

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 10:23 am

I've been going the assumption that the stock pattern and size is; 5 x 115 and +32mm offset.
I believe I've come to that conclusion after having looked up the factory size on multiple sites while looking for aftermarket wheels.
Every site that provides the info has come up with the same size.
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 10:43 am

99.9% positive our wheels are 5x115.

offset i'm not positive on b/c i believe the different factory wheels have slightly different offsets. +32, +34 sounds about right.

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 11:41 am

We could guess that the larger wheel (7") would have the smaller +32 mm offset, while the smaller (6.5") would have +34 mm offset. Correct? This would seem to keep the position of the wheels' inside edges (backspace distance) consistent in relationship to the hub. Stock backspace is 5.1-5.2" based on the assumed specs.

I'm looking at Tire Rack's compatible 18" wheel size replacements:

18x7.5"
Offset: 38-45mm
Backspacing: 5.82-6.06"
Bolt Pattern: 5-115
Rec. Tire Size:245/45-18

18x8.0"
Offset: 40-45mm
Backspacing: 6.06-6.29"
Bolt Pattern: 5-115
Rec. Tire Size:245/45-18

18x8.5"
Offset: 35mm
Backspacing: 6.10"
Bolt Pattern: 5-115
Rec. Tire Size: 245/45-18

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 11:46 am

Aaron, You thinking about getting some 18" wheels ????
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FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info Empty
PostSubject: Re: FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info   FAQ: Wheel & Tire, Lug, Bolt Pattern, Offset, Center Bore Info EmptyMon Jan 04, 2010 7:24 pm

I am thinking about auto-crossing this summer, and some lighter, lower profile rims should improve the handling a bit. It grabs fine with the stock rims, but I'm hoping to improve the road feel and reduce unsprung mass. Just looking right now...

I just called a retailer out of Cincinnati called Elites-Wholesale.com - guy's name was Derrick - extremely helpful, with some useful info:

There's a bolt pattern called 5x114.3 (4.5") that will fit our hubs just fine, he says. The holes are typically made with a little slop, so this is good to know when searching for wheels. Most sites like Tire Rack.com will not show the 5x114.3 size as matching the Riviera. Derrick says many newer cars use the 5x114.3 size, so it's a more common wheel choice than 5x115.

This expands wheel compatibility to include the following cars:

Ford Mustang
Ford Crown Vic
Mazda FD RX-7
Mazda Protege5
Mitsubishi 3000GT
Nissan 300ZX
Nissan 350Z
Nissan Altima 2003+
Nissan Maxima
Nissan Quest

More info: Link and complete list of cars: Link

Keep in mind, the above are only compatible regarding bolt pattern, NOT rim thickness or offset. Searching Tire Rack.com or the like under these cars will produce wheels that bolt on the hub, but not necessarily wheels that clear the wheel wells when turning.

Also, he mentioned many of the lower priced rims are made in one of 3 foundries in China. Although the designs are protected under brand names, the quality is about the same. In short, any wheel under $200 or so is probably Chinese made, and of the same quality level as the next brand.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown
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