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#1
08-28-2009, 05:42 AM
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Need your opinion with Exhaust
I have a 1997 GTP with 160K miles. Mods include the following
3.4 Thrasher MPS 1.9 ZZP High Ratio Rockers ZZP Front PEM Ceramic Coated Crossover Pipe 3 in ZZP Stainless downpipe ZZP Ported LIM Custom CAI ZZP Throttle body spacers ZZP PCM ZZP Fuel Pump Rewire Kit ZZP Alternator Booster kit 180 Degree thermostat NGK Iridium 6's PRJ 10.4 mm Race wires I am looking into purchasing an exhaust system next from ZZP and was wondering if anyone has had any luck with their systems. I am looking for a system that will give me a nice deep throaty tone without a raspy sound. I am currently considering the aluminized exhaust system to save a little money, but I am wondering if I will be sacrifiicng quality over the stainless system. Also should I run a resonator or not? Proflow or Magnaflow mufflers? What's your guys opinion? 
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#2
08-28-2009, 10:26 AM
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Re: Need your opinion with Exhaust
Hi,
I've never heard of proflow but I would say that Magnaflow is the way to go for throaty but not raspy compared to other mufflers. Most local custom exhaust shops can custom make a system for you. Aluminum will rot over time.
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1998 silver gtp, GM performance Handling kit ,cold air intake, KYB struts ,HD supercharger coupler ,Gatorback belts ,U bend delete ,NGK TR6 plugs ,DHP PCM, Electric exhaust cutout - SOLD 98 White GTP, N* TB, 3.0 MPS pulley, SLP headers, 1.9 Rockers, 105# springs, ZZP PCM, Flowmasters, GM performance Handling kit, FWI, GMPP springs, U bend delete, SSIC, Ported LIM, Autolite plugs, ported SC, 12" brake upgrade with slotted cross-drilled rotors,
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#3
08-28-2009, 03:34 PM
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Re: Need your opinion with Exhaust
Should I go with a 2.5in or 3 in system? Otherwise should I consider getting ZZP stainless headers instead? I already have a front PEM. How much more of a gain should I expect with the ZZP headers?
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#4
09-01-2009, 06:31 PM
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Re: Need your opinion with Exhaust
Anyone else have an opinion? I have about $600 to spend on my next car mod.
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#5
09-01-2009, 09:38 PM
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Re: Need your opinion with Exhaust
2.5" system. Headers are superior over PEMs. On the average about a 25 hp increase with headers. However, with most headers the power band will shift from mid-range to high which isn't a bad thing either. The L67 engine especially with boost mods has enough torque to make up for any possible low end loss. I run SLP aluminum ceramic coated headers and very happy with them.
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'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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#6
09-01-2009, 09:51 PM
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Re: Need your opinion with Exhaust
I agree on the 2.5" stainless. That's what I have on mine. I also scrapped the resonator and I'm happy with it.
__________________
  2000 Pontiac Grand Prix GTP 3.8L SII V6 S/C 2000 Jeep Grand Cherokee Limited 4.7L V8 ---------------------------------------------------- 1996 Chevrolet Camaro Z28 5.7L V8 1993 Chevrolet Suburban K1500 5.7L V8 1991 Ford Probe LX 3.0 V6 1986 Ford Tempo GL 2.3L 4 cyl.
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#7
09-02-2009, 06:02 AM
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Re: Need your opinion with Exhaust
Whats the overall effect of removing the resonator? I want a deep tone but nothing too loud were I'll piss off my neighbors. I also wanted to go with a 2.5 inch system but ZZP had a gently used 3in stainless dp and I jumped on the buy. Is there potentially any problems with having a 3in dp and 2.5 exhaust?
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