Quote Originally Posted by JustanAlias View Post
First off, this is me http://www.grandprixforums.net/you-e...ain-62729.html

I have a 2002 GTP and am ready to start modding. Here's what's happening in the next few weeks:

Terra 1.9 rollers/pushrods
LS6 lifters/springs (thanks Billy)
Manley retainers
fenderwell intake
3in. off-road downpipe (considering headers)
colder plugs
PCM Tune *
throttle body spacer
throttle body heat sheild
180 stat
new belt
3.4 pulley
new rod bearings (133,xxx..to be safe)
poly dogbone bushings (considering shortened dogbones)

Ok, now for a few questions...

I need to opinions on who I should have do my PCM?

Headers, of what's still available, who's have the easiest install and less prone to leaks?

I'm considering a ported TB....again, who?

Machined lower intake, intercooler, ported s/c....thoughts?

Long term...over the winter the motor's coming out for a full performance rebuild and head work, (Machined lower intake, intercooler, ported s/c) performance trans/converter/gears. Doing big brakes, suspension rebuild/upgrades, paint, and cosmetics (SD hood, halos, LED tails, wheels/tires, tint).

Any and all input is VERY welcome...thanks for reading!
I don't believe anyone has the Yella Terra 1.9s and I don't believe they're making them any more. They've been on eternal backorder. ZZP still has them listed so maybe they have a few sets. We're all out though.

I'm going to recommend the 105lb springs over the LS6. They're a bit more money but put less overall stress on the valve train despite their higher spring rate.

A downpipe is easy to install and gives solid gains but if you plan on going for headers down the road, just bite the bullet and do it now. There are a bunch of eBay brands out there that require some finesse to make work. Most people don't like doing that and for those people there's Pacesetters. They're mild steal but they're only $369. For stainless steal headers that bolt in with no trouble, I think we have the cheapest, easiest to install kit but it's still significantly more expensive than the ebay stuff.

I'd recommend us for the PCM but I'm hardly objective so take the advice of other people here. Canned tunes aren't the devil but they were meant to be used on cars that had low miles and were all pretty much starting at the same baseline. Now that they all have higher miles we see cars that are in stock condition and well maintained and cars that are hardly running. Make sure the car is mechanically up to par and a canned tune is going to be just fine until you start to get more serious.

Ported TB, there's not going to be any difference between vendors.

Intercooler, ours is the cheapest full kit out there.

Transmission, We can set you up. Otherwise ZZP and Dave Norris make them to order. Dave Norris is pretty popular.