Silvertop throttles are a bit smaller diameter than blacktop.
Hey all I have a 16v bigport 4age and I'll eventually be putting cams and ITBs on it I've already got a set of silver top ITBs and an emanage for it and I no I need an adaptor bracket for them to fit my 16v but I was wondering what are the differences between the black top and silver top ITBs because I've read that they are slightly different in some way?
Silvertop throttles are a bit smaller diameter than blacktop.
Oh cool thanks
i think,silver top are 42 mm and blacktop are 45 mm
James is right, the blacktop throttles also have a kidney shape out the back of them. You would likely loose power fitting them instead of the silver to your engine.
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