Exhaust Build Questions-before i buy

**asite57** · 07-01-2012

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

**Scottydoggs** · 07-01-2012

glass pack for a res.

**asite57** · 07-01-2012

right i would just pick that up from a local parts store but does everything else look good?

**Btownmills** · 07-01-2012

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.

**matt5112** · 07-01-2012

Stock o2 sensor location sucks.

Move it into the crossover.

**Fivefingerdeathpunch** · 07-01-2012

Originally Posted by Btownmills

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.

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.

**asite57** · 07-01-2012

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?

**asite57** · 07-01-2012

bump

**asite57** · 07-03-2012

anyone else have an opinion on this?

**dbextreme** · 07-03-2012

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...

**matt5112** · 07-03-2012

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%

**dbextreme** · 07-03-2012

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.

**matt5112** · 07-03-2012

Catback also drowns out the 3.4 pulley at WOT.

Need less pulley.

**asite57** · 07-03-2012

im not so much focased on the sound just do i have all the pieces to do the build?

**matt5112** · 07-04-2012

Youll need gaskets and rtv.

**asite57** · 07-04-2012

i plan on reusing he stock gaskets and rtv will melt

**gtpeddie** · 07-04-2012

copper RTV

**asite57** · 07-04-2012

is that what you used ive heard some mixed reviews

**gtpeddie** · 07-04-2012

no i dont have headers yet, im just saying i dont think copper RTV is going to melt easily

**asite57** · 07-04-2012

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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