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 ZZP Downpipes

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RhinoFLA
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PostSubject: Re: ZZP Downpipes   Sat Mar 15, 2008 3:24 pm

AA wrote:
Don't know, but you might be able to use a pipe expander to make it work.

More than likely. But the problem is the length. I'm not sure that would be enough to replace the cat. Summit sells 3 inch piping, 4 feet for 12 bucks or something. Or I could go to a local muffler shop and ask them to cut me a 3" dia. piece however long it would take.
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AA
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PostSubject: Re: ZZP Downpipes   Sun Mar 16, 2008 1:48 pm

I only used about 3.5" because I also put in a Flowmaster venturi cone (very gradual taper from 3" to 2.5", and I did this before the resonator.

If you get a custom length cut, ask for stainless.

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Mr.Riviera
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PostSubject: Re: ZZP Downpipes   Sun Mar 16, 2008 10:10 pm

i got my 1.5' piece of 3" steel straight pipe at autozone. it was like $8 IIRC, but dont quote me. hasnt rusted yet btw

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1996 with 244k miles, L324" 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.
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RhinoFLA
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PostSubject: Re: ZZP Downpipes   Wed Mar 19, 2008 8:54 pm

Is that what you needed to replace the cat?
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bmcd9179
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 3:52 pm

Hi guys I want to get some nice headers and a downpipes, with a cat do to dumb utah laws. So for this hogan downpipes, should I just get one with a cat? Or buy a magnaflow one separate? And the main question, does it bolt right on?
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 3:55 pm

http://www.3800performance.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=HP-DP3&Category_Code=ES_H&Product_Count=24
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matt270avian
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 4:35 pm

97+ has a bolt in cat. We have the 96, which is welded in. Aftermarket headers come with a downpipe but not usually a cat.
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bmcd9179
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 4:41 pm

So I would have to weld? Which isn't a big deal. And get a separate cat?
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 5:55 pm

Yes.
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h20man
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 10:24 pm

I have a 96 also, what downpipe is better for that year Hogan or zzp or does it matter? I heard either way I need to get it welded with some grinding of the stud holes
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96_Juggernaut
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PostSubject: Re: ZZP Downpipes   Sun Dec 22, 2013 10:55 pm

I'm pretty sure the ZZP H-body downpipe is the best fit. They even advertise them for the Riviera, plus they are the chepest
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PostSubject: Re: ZZP Downpipes   Mon Dec 23, 2013 12:09 am

They are. You just need to clamp/weld the high flow cat in. Other than that it's bolt in.
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PostSubject: Re: ZZP Downpipes   Mon Dec 23, 2013 8:39 am

Zzp it is then, I still need to have it welded to the manifold flange though right?
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PostSubject: Re: ZZP Downpipes   Mon Dec 23, 2013 9:43 am

No. It will bolt up to that.
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PostSubject: Re: ZZP Downpipes   Mon Dec 23, 2013 11:29 am

Sounds like I'm going zzp to thanks guys!
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PostSubject: Re: ZZP Downpipes   Sat Jan 11, 2014 10:34 pm

I've had a zzp 3 inch dp sitting in my closet for close to 3 years now, i should probably do something with it sometime
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PostSubject: Re: ZZP Downpipes   Sun Jan 12, 2014 9:14 am

I ended up buying the Hogan hbody downpipe with the welded magnaflow cat, hopefully it bolts up to the flange like stated earlier, the zzp hbody deletes the cat which I can't have in my state.
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PostSubject: Re: ZZP Downpipes   Sun Jan 12, 2014 10:02 am

h20man wrote:
I ended up buying the Hogan hbody downpipe with the welded magnaflow cat, hopefully it bolts up to the flange like stated earlier, the zzp hbody deletes the cat which I can't have in my state.
ZZP has a option for a cat in the drop down menu, $189
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PostSubject: Re: ZZP Downpipes   Sun Jan 12, 2014 12:33 pm

h20man wrote:
I ended up buying the Hogan hbody downpipe with the welded magnaflow cat, hopefully it bolts up to the flange like stated earlier, the zzp hbody deletes the cat which I can't have in my state.

Sweet man, what year is your riv? Let me know how it goes putting it on any troubles and such.
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71stagegs
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PostSubject: Re: ZZP Downpipes   Sun Jan 12, 2014 1:36 pm

When you put a downpipe on with high flow cat is exhaust louder any other brands of cats anyone try
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PostSubject: Re: ZZP Downpipes   Mon Jan 13, 2014 12:05 am

bmcd9179 wrote:

h20man wrote:
I ended up buying the Hogan hbody downpipe with the welded magnaflow cat, hopefully it bolts up to the flange like stated earlier, the zzp hbody deletes the cat which I can't have in my state.


Sweet man, what year is your riv? Let me know how it goes putting it on any troubles and such.

I have a 96, I'm having a shop do the down pipe and weld a system up all at once
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bmcd9179
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PostSubject: Re: ZZP Downpipes   Mon Jan 13, 2014 12:13 am

Oh really? Let me know how it goes, performance wize!
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h20man
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PostSubject: Re: ZZP Downpipes   Mon Jan 13, 2014 7:57 am

Will do, my downpipe should be at my work today! smile
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