CAI's may help a small %age of cars but most of us see exactly jack. Especially for the cost of a CAI. Fenderwell CAI's are even more hit and miss with the messed up MAF readings. Throw the car on a dyno and check the AF if it's ok and not showing spikes of rich and lean then you lucked out.
On a side note:
why bother with an offroad pipe? The modern high flow catalytic converter doesn't plug much and costs almost nothing power wise but you'll be doing your part as a responsible over user of petrol.
I hate to harp on that point but we are the people that are going to have fingers pointed at us in the coming 20 years and if we want to keep our hobby legal we need to show at least a modicum of attention to the environmental effects caused by running without cats.
BTW... the 05's are showing up to 20+hp with a CAI because the factory plugged the crud out of the stock inlet with filters and narrow tubes and all that. It's not surprising to see those gains on them. All of the hating on CAI's is exclusive of those models for 05+ GT's.
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