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thanx for all your prompt reply guys, appreciate it very much. i'm changing my clutch/flywheel that's why i was planning to do some head mods while the engine is out. i have a bwr sc for 8 months now and i'm wondering with the port/polish if it will throw my a/f ratio way off that i'll need a custom tune for it? thanx everyone and i'm ready for power upgrade Phil.
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