whats the max rpm i can run with a stock jdm gsr exhaust manifold???
its a b16 with the head and bottom end built. i cant fit a 4to1 on it due to ground clearance. the stock mainfold has a 2 1/2 outlet. any ideas on how high its worth taking?
Definately some point before parts decide they are not happy where they have been residing and decide to leave the engine block.
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..J/K

