How restrictive is the stock tb and mas air, im running the 90mm proflow xt intake but my tb and mafs are still stock, Im wondering how much there would be to gain by upgrading to a 90mm tb and mafs or take the mafs out and get a speed desitiy tune put on. Is 300 buck worth it for the tb plus the mafs.. I just keep thinking all the money i spent in my intake might be worthless if this is holding me back??

 

No one know what to think here??

 

Stock throttle body is 78mm. I'd recommend the 90mm throttle body and a SD tune. You should notice a pretty good difference with your heads/cam setup.

 

or you could spend another 300 bucks on a good 90mm MAF sensor and get a regular tune.