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ImSweetAndSuch 03-31-2008, 06:25 AM Will the Doctor Speed cold air box fit on the GXP since its the same engine as the GTP? Im looking to mod mine when i get it and any info on this would be helpful. Also does the stock version come with a performance exhaust or do you have to get it dealer installed? oomonte 04-01-2008, 01:03 AM yes they emailed me saying the dr. speed will fit my 2008 gxp with the 3.6. and the performance exhaust is an $900 extra unless you can get 20% off the top. ImSweetAndSuch 04-02-2008, 01:26 PM Thank you! Ill prolly go with the GTR exhaust I'm assuming that will fit the GXP. coolmanvette75 04-09-2008, 02:54 PM dr speed is out of buisness (i dont no how long or if they will come back). CRAB Intakes makes 1 for the gxp using dr speed tubing. www.crabintakes.com enjoy Bruce1248 04-13-2008, 10:13 AM Thank you! Ill prolly go with the GTR exhaust I'm assuming that will fit the GXP. Yes it will fit great and the sound is better then the GM performance exhaust. oomonte 04-13-2008, 06:35 PM if your car has the three cat system,a little more work than bolting the gt-r exhaust on is required... jennyjones8732 07-14-2008, 11:45 AM if your car has the three cat system,a little more work than bolting the gt-r exhaust on is required... i have the gt-r exhaust on my gxp and the place i had it installed at had to cut and weld it to fit. | ||