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| Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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01-25-2015, 05:16 AM
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Senior Member
Join Date: Jan 2015
Drives: 2013 BRZ
Location: NY
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porting header
Hey guys wanted to know if anyone has port matched their header. Im thinking of doing this at the header flange. I know the rule is do not go past the carbon build up cricle but does anyone know the exact size of the opening on the engine? Also the carbon circles on the header are not centered they are a bit off. So should i still follow the carbon when port matching or does the header have play? I dont want it to have play and then i ended up grinding out more than necessary
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