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#119837 - 02/03/08 08:48 PM Re: Lots of questions about downpipes
burtonsyncro Offline
Member
Registered: 12/27/07
Posts: 174
Loc: NY
My neighbor can do it all for me... free
Good deal.
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2002 grand prix gtp: grills, projectors, 6000k hids, P6 projector fogs with halos and 6k hids, 2 10" subs, pg 1kwatt amp, blue l.e.d. interior, l.e.d. exterior, K&N cold air intake, slp gen 1 spoiler, inlays.
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#119838 - 02/03/08 09:43 PM Re: Lots of questions about downpipes
Chico Offline
Member
Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
Installing the U-bend delete is a waste of time and money,you probably have the original cat which will soon need replacing so why not go with a 3" stainless DP with a hi-flow cat and gain some real performance and avoid having to redo the job later if not sooner ,just my 2 cents.Chico(pops)
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04 GTO stock,04 Titan,97 GP GT too many mods to list,90 Corvette & project cars, http://photobucket.com/albums/v206/chico1319
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#119839 - 02/03/08 10:14 PM Re: Lots of questions about downpipes
20gtp02 Offline
Member
Registered: 04/13/06
Posts: 6709
I have an 02 GTP and the down pipe was a great mod! I got exactly what Chico suggested. The 304 Stainless with interlock flew, and high flow cat. It has now been custom redone to hook up to my headers, but it was a great mod.
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2002
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#119840 - 02/04/08 02:46 PM Re: Lots of questions about downpipes
burtonsyncro Offline
Member
Registered: 12/27/07
Posts: 174
Loc: NY
I dont have that kind of money. That would cost like 250 bucks. Im spending 35 instead.
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2002 grand prix gtp: grills, projectors, 6000k hids, P6 projector fogs with halos and 6k hids, 2 10" subs, pg 1kwatt amp, blue l.e.d. interior, l.e.d. exterior, K&N cold air intake, slp gen 1 spoiler, inlays.
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#119841 - 02/04/08 02:48 PM Re: Lots of questions about downpipes
20gtp02 Offline
Member
Registered: 04/13/06
Posts: 6709
We speak form experience. It'll end up costing you more than $35, most likely. And that cost could be best spent towards a downpipe.
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2002
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#119842 - 02/04/08 03:28 PM Re: Lots of questions about downpipes
HercMan(Rob) Offline
Member
Registered: 09/12/03
Posts: 14035
Loc: Fort Worth, Texas
Or you could hold off until that cat does fail and then it'll be much cheaper to swap the whole DP for an OEM cat.
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#119843 - 02/04/08 05:46 PM Re: Lots of questions about downpipes
ordonez1307 Offline
Member
Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
we arent able to force you to do it, but we can speak from doing it before. Do whatever you want, but youre more than likely going to regret it.

You can lead a horse to water...
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Corey Smith
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#119844 - 02/05/08 12:05 AM Re: Lots of questions about downpipes
Doug in CT Offline
Member
Registered: 11/22/06
Posts: 86
Loc: CT, USA
I'm glad I went with the whole down-pipe instead of the u-bend delete. I went with a Magnaflow MPE-23405 DP from Summit Racing for less than $150. It took me less than 2 hours of actual work. Of course, prep work began early in the morning. Here's my process:
1.Drive the car onto ramps. 2.Eat breakfast while exhaust cools completely. 3.Thoroughly douse bolts with rust penetrator & drape a soaked rag over bolts. 4.Kill a few hours to let the rust penetrator do it's thing). 5.Get to work.

You need a variety of extensions and one of those bendy u-joint socket thingys (someone please tell me what those are called) and a long socket wrench or breaker-bar (for maximum torque). My GP is a '98 living in New England and the rust penetrator worked well enough that the nuts came off easily and undamaged.
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'08 Grand Prix base - '06 Montana SV6 - '76 L-82 Corvette
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#119845 - 02/05/08 12:34 AM Re: Lots of questions about downpipes
Blackarrow98GP Offline
Member
Registered: 06/29/06
Posts: 3618
Loc: CT, U.S.A
Quote:
Originally posted by Doug in CT:
I'm glad I went with the whole down-pipe instead of the u-bend delete. I went with a Magnaflow MPE-23405 DP
What he said! hammer
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#213561 - 05/06/11 03:27 PM Re: Lots of questions about downpipes [Re: burtonsyncro]
jbruce Offline
Junior Member
Registered: 05/06/11
Posts: 1
Does anyone know where I can buy a dp with a high flow cat for cheap. I have a 97 gtp
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#213563 - 05/06/11 05:02 PM Re: Lots of questions about downpipes [Re: burtonsyncro]
Richard Candelario Offline
Member
Registered: 12/15/05
Posts: 5286
ZZPerformance is where I JUST bought mine from. They were the best deal overall. Iirc, I didn't pay much more than $220.
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.

98 L36/MM5
RaC
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#213571 - 05/07/11 10:52 AM Re: Lots of questions about downpipes [Re: Doug in CT]
HercMan(Rob) Offline
Member
Registered: 09/12/03
Posts: 14035
Loc: Fort Worth, Texas
Originally Posted By: Doug in CT
You need a variety of extensions and one of those bendy u-joint socket thingys (someone please tell me what those are called)


U-joint adapter.
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#213572 - 05/07/11 12:01 PM Re: Lots of questions about downpipes [Re: HercMan(Rob)]
Zalfrin Offline
Member
Registered: 04/08/08
Posts: 2647
Loc: Iowa City, IA
Originally Posted By: HercMan(Rob)
Originally Posted By: Doug in CT
You need a variety of extensions and one of those bendy u-joint socket thingys (someone please tell me what those are called)


U-joint adapter.


You're replying to a 3 year old post.
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'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner
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#213573 - 05/07/11 02:18 PM Re: Lots of questions about downpipes [Re: Zalfrin]
Richard Candelario Offline
Member
Registered: 12/15/05
Posts: 5286
Originally Posted By: Zalfrin
Originally Posted By: HercMan(Rob)
Originally Posted By: Doug in CT
You need a variety of extensions and one of those bendy u-joint socket thingys (someone please tell me what those are called)


U-joint adapter.


You're replying to a 3 year old post.


Herc=OWNED!
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.

98 L36/MM5
RaC
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#213615 - 05/09/11 10:04 AM Re: Lots of questions about downpipes [Re: burtonsyncro]
HercMan(Rob) Offline
Member
Registered: 09/12/03
Posts: 14035
Loc: Fort Worth, Texas
I don't look at the dates. I just read the threads.
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