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Exhaust Build Questions-before i buy

asite57

asite57

New member
i have a 99 GTP i need to do headers and my stock cat back is toast, rusted and cracked same with the stock mufflers so i was wondering is this a good headers build list and will this cat back bolt up to these headers:

headers
Pontiac Performance Racing Products for International Sales from SSAutochrome Inc.

Easy Performance - O2 Emulator #EP-O2SM-GM01
Easy Performance - O2 Extension Harness #EP-O2EXHN
ZZPerformance - O2 Sensor #
Exhaust Band Clamp X2
Exhaust Band Clamp X2

and will this cat back just bolt up?

ZZPerformance - 2.5" Aluminized Catback Exhaust #ZZ-25GPALCB


is there anything im missing? i know bill has a good write up that ill be using just wondering everyones thoughts
 


Are you actually going to need the extension and O2 sensor to install the headers? I have a 98 and am wondering if I will need those same parts with my headers.
 
Btownmills said:
Are you actually going to need the extension and O2 sensor to install the headers? I have a 98 and am wondering if I will need those same parts with my headers.
Click to expand...

Yes, if you leave it in the same spot on the SSAC and SD headers. You could make one, buy I'd rather buy one and know it works.
 


i agree with FFDP about the harness and as for the o2 its self mine is bad so i figure id kill 2 birds with one stone and replace it when i do the headers guys i dont wanna sound rude but does this look like everything? and (if anyone knows) will that cat back bolt right up like are the flanges the same size and the lengths correct?
 
Don't use Blowmasters!!! LOL I have a new downpipe, Magnaflow cat, Ubend delete, res delete, two Flowmaster 40's... I could tell a difference in performance AND sound... I am debating on putting Magnaflow's on inplace of the flow's but I might just put on some turbo's to quiten it down a lil. I have heard that there are not many performance gains removing the stock mufflers for something else. I do love how my car sounds at idle, but through about 2500 RPM it's raspy, but cruising it's mellowed out so much the rumble puts my fiancee and kids to sleep.. LOL Just my $.02...
 
I had to change my shift points so it would never let the engine spin at less than 1800 otherwise the drone is overbearing.

This is with the full magnaflow catback.

Do I regret this purchase? 100%
 


I know right!!!!!

So plan B. I'll go with a set of turbo's or find some decent stockers... HA HA I'll go with turbos or maxi muffler specials.
 


idk the people at belle tire said not to use that and i know its just belle tire but if they would use it im not so sure i would
 
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