B20B exhaust question???

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Jun 10, 2008 | 10:27 PM

rEnZ94tEgGy

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From: USA

B20B exhaust question???

i currently have a jdm b20b with ls tranny, I/H/E bored out throttle body, chipped ecu, and hollowed cat...what size exhaust should i run?????

Jun 10, 2008 | 10:33 PM

teamXteg

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From: Joplin, Missouri

Re: B20B exhaust question??? (rEnZ94tEgGy)

i wouldnt run nemore than 2 1/2.. im runnin b20/vtec built wit tanabe 2 1/2 cat-back. only way i would run bigger is if u went with forced induction

Jun 11, 2008 | 12:22 AM

Christopher Couture

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From: Orange County, CA

Re: B20B exhaust question??? (teamXteg)

I'd get 2.25".

You're not making any more power then a GSR so theres no point in getting anything bigger. Don't listen to anyone that says bigger exhaust = more airflow junk.

no backpressure = lost of power.

Jun 11, 2008 | 08:40 AM

JThrasher79

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From: 619, CA

Re: B20B exhaust question??? (Christopher Couture)

^^^not very smart

go 2.5

Jun 11, 2008 | 08:43 AM

Jimmy

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I'm running i/h/e no cat on my b20b tuned on crome pro with 2.25 inch piping to a twinloop knockoff muffler with zero problems.

Jun 11, 2008 | 08:52 AM

ivan93egreppin210

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From: san antonio, TEXAS, UNITED STATES

Re: B20B exhaust question??? (Christopher Couture)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Christopher Couture »</TD></TR><TR><TD CLASS="quote">I'd get 2.25".

You're not making any more power then a GSR so theres no point in getting anything bigger. Don't listen to anyone that says bigger exhaust = more airflow junk.

no backpressure = lost of power.</TD></TR></TABLE>

no offense dude but have you ever lost power from putting a bigger exhaust or are you just repeating things you read? i think you need to read this before you keep passing bad info.

https://honda-tech.com/zerothread?id=2298917

to the op. do not listen to this guy. you dont want back pressure, you want proper "scavenging". it is explained very well in this thread. this is a must read.