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i just got my b20 vtec dyno tuned and was wondering how big of a difference running open header would make. i have a press bent 2 1/4 exhaust. how much do you guys think i will gain by running ope header. i wanted to get it tuned open hader but my bung was 1 inch away from the end of the header.

i dynoed at 190WHP and the dyno has low readings(10-15% lower)....i forgot the name of the dyno.
 

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i just got my b20 vtec dyno tuned and was wondering how big of a difference running open header would make. i have a press bent 2 1/4 exhaust. how much do you guys think i will gain by running ope header. i wanted to get it tuned open hader but my bung was 1 inch away from the end of the header.

i dynoed at 190WHP and the dyno has low readings(10-15% lower)....i forgot the name of the dyno.
lol ask your tuner
 

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lol ask your tuner
:lol x2
if you have a honda thats putting down that much power na, then you should have known this answer by now, running open header is not a good idea
 

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open header = burnt exhaust valves. Honda engines are not pushrods, and an open header wont maintain proper exhaust velocity. You'd just be the most annoying sounding car on the road :lol
 

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BWWWWWWWWWWWWWAAAAAAAAAAAAAAAAPPPPPPPPPPPPP!!

Yeah, thats about how gay its gonna sound, please dont do it for the sake of peoples ear drums.
 

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