Well it was a well respected tuner on HERE that told me a 10mm spacer would make the 4x4 plenum cover a 500 plus BHPer ...Other lesser tuners also.

So Ryan less of the asthough i am dumb ..i am just goin by tuners advice which i have worked out to be total bollocks

Not good...not good at all.

Stu,Karl???????Explain???