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Discussion Starter #1
is it absolutely necessary to bore out the intake manifold to 65mm when you upgrade to a 65mm TB?
 

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^^^ he's right, plus is would interupt the flow of air into the intake.
 

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it's not pointless, you can tell a big difference in throttle response, but there is a restriction there and will be more free flowing if it gets ported
 

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you don't need to port to notice the gain, it helps
but for an average person dont' bother, just get a sri and a tb
cut the lunchbox off the back and it sounds damned good
 
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