LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

performance parts?

Old 02-20-2010, 06:50 PM
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Default performance parts?

I'm new here and i just bought an 06' gxp. I have been looking for anything for my car and can only find a catback exhaust system, cai, and turbo kits. i was wondering if anyone can help me with any websites or shop near me or something?
Old 02-20-2010, 06:54 PM
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Just look through most of the threads, your find that if you do a little searching you get a lot of info on lots of things rather then just suggestions.
Old 02-20-2010, 08:47 PM
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Headers are coming out soon, group buy going on now, regular $960, now its 599.95, contact me if you want in.
https://ls1tech.com/forums/ls4-front...ct-update.html

Last edited by williamGT; 02-21-2010 at 12:59 AM.
Old 02-21-2010, 05:43 AM
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Welcome. Any pics of your car? And another thing is LS6, LS2 intake manifold swap but there is a lot of fabbing up you have to do to get it to work. Also a down pipe catted/catless. Doing a search will help a lot.
Old 02-21-2010, 10:47 AM
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SEARCH SEARCH SEARCH!

And welcome...

http://drcustomparts.com/HomePage.htm
Old 02-21-2010, 11:44 AM
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you can port and polish your existing heads
Old 02-21-2010, 02:10 PM
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First thing to do..beef up the trans. and or ad a tranny cooler.
Old 02-21-2010, 03:31 PM
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Pretty much just look at sittingmongooses sig and that's all you need lol
Old 02-21-2010, 08:32 PM
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Thanks for the help from everybody. one other question the tranny in this is it the same as what comes in the gtps or what?
Old 02-22-2010, 01:28 PM
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its very simliar, ours has harder truck parts in it. They are still a major weak point. Many are going around 30k miles. The same parts will fit thought between the two, i believe
Old 02-23-2010, 07:46 PM
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Ok i thought they were the same. i just bought my car the 4th of jan. and drove it a week and the tranny had to be replaced cause it would not move in drive or anything but if i shut the car off it would drive for but a minute. the dealership put a jasper tranny in it now. ive had it back for a week and it seems fine. so there is not much room to mod the car without beefing up the trans?
Old 02-24-2010, 02:17 PM
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Originally Posted by Hawkins04
Ok i thought they were the same. i just bought my car the 4th of jan. and drove it a week and the tranny had to be replaced cause it would not move in drive or anything but if i shut the car off it would drive for but a minute. the dealership put a jasper tranny in it now. ive had it back for a week and it seems fine. so there is not much room to mod the car without beefing up the trans?
ehh not too much room, some trans seem to be holding together better and some are just junk it seems like so u never really know i guess/
Old 02-24-2010, 03:52 PM
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I am probably putting down the most(except the turbos and nos cars) and mine hasn't blown, but i am expecting it to happen any day now.
Old 02-25-2010, 11:06 AM
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Would i be safe to do a downpipe, catback exhaust, and a tune? i already put a cai on the other day. the tranny has been replaced already. it was done a week after i bought it so its been maybe 3-4 weeks now. the dealer gave me a warranty of 3 year 100,000 miles and its a jasper tranny and warranty.


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