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Guest INASNT
Originally posted by Zdenko

so there is a differnce then??

would it make much of a diffrence if i replaced this now.....?

or no point??

yes there is, but u r on a need to know basis, and at the moment u dont need to know! ;)

PS hope u havent ripped any fully sick burnouts in public carparks when people are around recently! :bahaha:

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Hi Zdenko, the bolt pattern and water jacket spacing on the RB25 head and the RB26 head are different. Making an RB26 manifold fit on an RB25 head is not an easy or inexpensive task. If it was, there would be a lot of them around.

The standard throttle body is OK to 450 bhp, so if you upgrade before then, you will find the engine looses response as it will be too big.

Hope that helps

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