Welcome first of all. And that sucks about your engine but now you can start off fresh. As far as performance upgrades you can do a WAMS tune which is made for the g6 platform. www.whiteautoandmedia.com/
click that for a tune. Everyone will recommend that to you. Will run you anywhere from 200-400 bucks depending if you buy new computers from them or send your own in. As for intakes go with crabs made by our own lampoon. www.crabintakes.com
. Those two things will give you a pretty good boost in power and increase your rev limiter and remove the top speed limiter so you don't top out at 110.
Next you need to look into lowering springs. You can get those off eBay. Either canucks, eibach, or h&r. Which are all good. Also look into a strut tower bar, upgraded motor mounts and a grounding kit all from www.racinglineperformance.com
to help with traction and cornering, and overall better performance out of your electrical systems.
Also some adjustable front endlinks and stainless steel brake lines from www.bmdperformance.com/
to help with better braking and stability while lowered.
Do all that and you'll have yourself one bad gtp pushing good hp and torque. And just better all around driving experience.
And all that can be done yourself with a pretty basic set of tools. And a spring compressor for the springs.
And then just read through this site and the other site. www.g6performance.com
and you'll learn everything you need/ want to know about your car.
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35% windshield, 10% all the way around, 20" Forte F55 Banshee's, custom painted interior, HVAC replace blue LEDS, PYLE double din dvd player, custom trunk with 2 12" Memphis-street edge subs, back up camera, blue LEDs under dash and dome, 2 blue strobe strips in trunk, tinted tails, blue LED reverse lights, debadged, front badge overlay, eyelids, 6000k lows/fogs, added oem projector fogs, third brake light overlay , shift boot added, blacked out grille, blue leds in grille, Canuck springs, BMD endlinks, res delete, R1 D/S rotors, blue calipers