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1998 Riv
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PostSubject: Re: Hogan Downpipe   Mon Jul 09, 2007 5:49 pm

AA wrote:
If read the 409 develops a surface rust, but that is supposed to be a protective coat that prohibits further corrosion. If the 409 is coated, it should last. My headers are 409. If I bought the Hogan DP, I might see about having it Jet coated, if they could do it with the braided section, I don't know.

I'd guess not on the flex coupler. Wonder how high temps are at the downpipe? I'm thinking some VHT paint might do the trick too.
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PostSubject: Re: Hogan Downpipe   Mon Jul 09, 2007 5:52 pm

http://www.azom.com/details.asp?ArticleID=969

Sounds like 409 is probably what our stock exhaust is made of.
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PostSubject: Re: Hogan Downpipe   Mon Jul 09, 2007 9:20 pm

the flanges will hold up but the tubing will get nasty an eventually crack....flexs are ok..but eventually the section under the braiding will crack an will leak... although more xpensive ..spring joints are superior...

heres a 3.5 dp i made for an evo in the shop... with a spring joint..
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PostSubject: Re: Hogan Downpipe   Mon Jul 09, 2007 10:27 pm

quote: "I'm thinking some VHT paint might do the trick too."

It's important to coat the inside with some heat-reflective material (ceramic). The 409 SS can erode due to heat stress from the inside out. Paint would protect the outside from moisture, but that's the lesser worry with stainless, imo.

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PostSubject: Re: Hogan Downpipe   Mon Jul 09, 2007 11:37 pm

Well Rob, it sounds like you need to produce and market some GOOD DP's for our cars. banana
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PostSubject: Re: Hogan Downpipe   Tue Jul 10, 2007 12:57 am

as well as fwi's :>
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PostSubject: Re: Hogan Downpipe   Tue Jul 10, 2007 8:09 pm

ill do that in my spare time..LOL
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PostSubject: Re: Hogan Downpipe   Tue Jul 10, 2007 8:16 pm

aw cmon rob.. it's your destiny
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PostSubject: Re: Hogan Downpipe   Tue Jul 10, 2007 8:19 pm

1998 Riv wrote:
Well Rob, it sounds like you need to produce and market some GOOD DP's for our cars. banana

He NEEDS to make us some FWIs first!
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PostSubject: Re: Hogan Downpipe   Wed Jul 11, 2007 11:29 am

I'm ordering a Hogan DP today. Don't know when the install will happen, but at least it will be here when I'm ready.
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PostSubject: Re: Hogan Downpipe   Tue Jul 17, 2007 11:14 am

My Hogan DP showed up yesterday, and it really looks good. Curt Hogan was great to work with, and answered my emails very quickly. Hope I will get a chance to install it this summer, and report back on the fit. I made progress on my 68 last weeked, got the manifolds and all the exhaust removed, so maybe there's hope.
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PostSubject: Re: Hogan Downpipe   Tue Jul 17, 2007 12:16 pm

I'm convinced the downpipe is one of the better improvements you can make to a stock Riviera exhaust, and from what I've seen Hogan looks like one of the better options. Hope yours makes a difference you can really feel.

_________________
'98 SC Riviera 268k 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 180 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


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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PostSubject: I ordered the Hogan 3" downpipe today! (INSTALLED)   Wed Jul 25, 2007 12:49 pm

Okay guys, I ordered the Hogan 3" DP today, it will be here in a few days. I got the interlock flex option, as well as both upper and lower gaskets. It was $182.00 for everything.

Let me just say that it was a pleasure to deal with Curt Hogan. Not only did he respond right away to my e-mails, I called him on the phone to order the downpipe and he was a very nice guy. I recommend ordering over the phone, because he is going to have my pipe done today, and it's going to be sent out tomorrow.

I'll update this thread when I do the install to let everyone know how it went!


Last edited by on Thu Aug 02, 2007 6:32 pm; edited 3 times in total
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 1:50 pm

Not surprised to hear this. I got mine a week ago or so. Curt was VERY prompt with email replies, and answered all my questions. I didn't actually even talk to him on the phone, I faxed my order in.

Haven't had time to install yet, my 68 project is first on the list, so please give us an update on the install if you do it soon. smile
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 1:53 pm

Good to hear. When you install, snap a few pics if you can. A write-up would be great!

_________________
'98 SC Riviera 268k 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 180 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


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 4:17 pm

I could easily do pics and a small write-up. I'm sure it's straightforward, but any snags I run into can be saved time for another member. I'll document everything - my phone has a 2.0 Megapixel camera that takes pretty good pictures (not blurry like most phone cameras).

I need to find out how to post pics on here, though - I've always wanted to, but don't know how. Is there a write-up on that? wink

And the same method for pic posting should work for RegalGS.org, right? These look like the same board host.
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 4:28 pm

Image posting instructions can be found in the FAQ link at the top of the page. We do not have the same host as RegalGS.org, but we use the same phpbb structure, which 90% of boards/forums on the web use.

_________________
'98 SC Riviera 268k 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 180 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


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 10:16 pm

Followed the instructions. I just want to see if this works:



This is our '89 Lesabre, and we used it to haul home a couch and chair. Ah, memories...


Hooray! It worked! Now I play the waiting game....
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PostSubject: Re: Hogan Downpipe   Wed Jul 25, 2007 10:18 pm

I hope you don't do that to the Riv. frown
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PostSubject: Re: Hogan Downpipe   Thu Jul 26, 2007 2:05 pm

Don't worry.... the picture doesn't show it, but the other side of the car was pretty wrecked. The car was totaled out at the time of this photo, but we're stll drivin' it - unfortunately, it's on it's last leg now (and has considerably more rust).
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PostSubject: Re: Hogan Downpipe   Mon Jul 30, 2007 4:39 pm

I got it in the mail today. I have to go to work, I'll probably post some pics of the downpipe late tonight (midnight or so).

Looks great, by the way. So far I'm very happy.
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PostSubject: Re: Hogan Downpipe   Tue Jul 31, 2007 12:40 am

Okay, here are the pictures of the downpipe, complete with gaskets.





(I know these pictures kind of stink. I promise, my phone camera wasn't set to sepia - that's just how they turned out.)

Solid welds all around, and just looks darn cool. Can't wait to install (Wednesday I get my car back from the body shop - more on that later).
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PostSubject: Re: Hogan Downpipe   Tue Jul 31, 2007 9:30 am

Nice quality, isn't it? I might get to work on mine on Thursday, taking the day off work. It's 2nd on my list of projects for the day. #1 project is to hang the dual exhaust on my 68 GS. Finally got the headers on last weekend, then found TA Perf had supplied some wrong pieces in the exhaust system I ordered... but they are on the way as we speak, UPS 2day.
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PostSubject: Re: Hogan Downpipe   Tue Jul 31, 2007 9:32 am

Looks like a good team project!

_________________
'98 SC Riviera 268k 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 180 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


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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PostSubject: Re: Hogan Downpipe   Tue Jul 31, 2007 10:51 am

Dual 2.5 mandrel for the 68. Those 2 downpipes were supplied by mistake, as they bolt up to stock exh manifolds.

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