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  #1  
Old 10-14-2005, 01:44 AM
GTP SUPERCHARGED GTP SUPERCHARGED is offline
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Lightbulb 98 gtp exhaust system

Im wanting to put and exhaust system on my car what would be the best brand?? Right now im lookin at a borla stainless steel cat back system, would this be a good one to go with?
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Old 10-14-2005, 09:58 AM
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Re: 98 gtp exhaust system

Quote:
Originally Posted by GTP SUPERCHARGED
Im wanting to put and exhaust system on my car what would be the best brand?? Right now im lookin at a borla stainless steel cat back system, would this be a good one to go with?

The Borla is expensive but sounds good. Go with your own gut feeling. Most of the guys on the forum will tell you that a CATBack exhaust system is a waste of money. I try to stay neutral in these matters. I'm not for CATBack systems nor against.

Another alternative brand would be SLP. See link below. Good luck.

http://www.3800performance.com/Merch...gory_Code=ES_H








Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials

1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.



__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold)
Timeslip 08/12/06

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Old 10-14-2005, 12:17 PM
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Re: 98 gtp exhaust system

Just get borla mufflers, not the entire catback. Use the money saved to buy some headers. You wont be disappointed.
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Old 10-14-2005, 03:47 PM
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Re: Re: 98 gtp exhaust system

Quote:
Originally Posted by Ripn12s
Just get borla mufflers, not the entire catback. Use the money saved to buy some headers. You wont be disappointed.

Rip, isn't most of the plumbing on those CATBack systems just 2.25"?








Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials

1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.



__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold)
Timeslip 08/12/06

AF Community Guidelines
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Old 10-14-2005, 07:27 PM
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Re: 98 gtp exhaust system

Catbacks are too expensive either way. I bought the MSP system back in the day and I wish someone would have told me what I'm telling this guy. I couldve bought headers for what that system cost me.

headers+highflow cat+cutout = perfect
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Old 10-15-2005, 08:37 AM
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Re: Re: 98 gtp exhaust system

I'm sure I made the right decision on passing on a CATBack system and going with headers. I not interested in sound only performance benefits. I run custom 2.5 inch plumbing from the woven flex joint, downpipe into a Magnaflow Hi-Flow CAT with 2.5 in/outlets, 2.5 inch including the Y replacing u-bend and resonator into the stock mufflers.

Most of the canned CATback systems have 2.25 inch plumbing which doesn't make any sense to me considering the big buck expenditure.

The headers are unequivocally the best mod you can do to the exhaust system.








Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials

1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.



__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold)
Timeslip 08/12/06

AF Community Guidelines
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Old 10-16-2005, 09:49 PM
GTP SUPERCHARGED GTP SUPERCHARGED is offline
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Re: Re: Re: 98 gtp exhaust system

I ended up getting that exhaust system.. i talked my family into getting it for me for christmas lol... so im gonna use the money i have saved up to buy some headers, cai, and smaller pulleys... but i just had a question... will the system still have the stupid ubend i need to replace?
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Old 10-16-2005, 10:00 PM
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Re: Re: Re: Re: 98 gtp exhaust system

Quote:
Originally Posted by GTP SUPERCHARGED
I ended up getting that exhaust system.. i talked my family into getting it for me for christmas lol... so im gonna use the money i have saved up to buy some headers, cai, and smaller pulleys... but i just had a question... will the system still have the stupid ubend i need to replace?
No. The CATBACK systems do not have a u-bend, however, they start at the back of the CAT convertor. Thats why they are called CATBack.
If you desire to get rid of the u-bend on your current stock system provisions will still have to be made to delete it.

Here's a pic of the u-bend:

http://www.pfyc.com/store/merchant.m...ory_Code=GPEXH

Have you considered replacing the stock CAT convertor with a hi-flow CAT or do you plan on keeping the stock CAT. The CATBack systems do not come with a hi-flow CAT. Has to be purchased separately.






Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials

1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.



__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold)
Timeslip 08/12/06

AF Community Guidelines
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Old 10-16-2005, 10:03 PM
GTP SUPERCHARGED GTP SUPERCHARGED is offline
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i havent really thought about it but i guess it does make sense to get everything and than have it all put on from the headers to the tips all in one big job than 3 or 4 little ones......would i still need some kind of modification tho??
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Old 10-16-2005, 10:06 PM
GTP SUPERCHARGED GTP SUPERCHARGED is offline
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Re: 98 gtp exhaust system

and what would you say the estimated increase in hp would be?? for all of that?
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