Removing centre and cat from STi 8
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From: just to your right
I was thinking of removing these and keeping the standard STi Back Box as I quite like it. Will this improve the performance or will I have to replace the BB as well?
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Joined: Mar 1999
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From: aberdeen
If I was you change the BB first cos you will find a performance increase by just doing that, the standard BB is very restrictive. The centre sections don't really make that much difference but again will give you a wee bit more.
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From: 1600cc's of twin scroll fun :)
There were problems with the 7's due to decatting, ie BIG boost spikes which aint good for your engine 
Id suggest you talk to one of the people who had this problem (Dave T-S springs to mind
) and see what he says about it.
Tony
Id suggest you talk to one of the people who had this problem (Dave T-S springs to mind
) and see what he says about it.Tony
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