hey wassup .. i have a gsr that have plans of around 180 whp ... i have a dc sports 4-1 header (2inch collector) , 2.25 test pipe , and rsr exmag 2.36 .. i really like the rsr exmag and dont plan on spending more money for another catback system so i was jus wondering if going dc sports jdm 4-1 (2.5 collector), 2.5 test pipe, to the rsr exmag 2.36 would be more benificial to what i have right now , or that it wouldnt really matter .. thanks

 

it will be a good improvement over stock

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ripperbone &raquo;</TD></TR><TR><TD CLASS="quote">it will be a good improvement over stock</TD></TR></TABLE>
true
but to truely get the maximum power from an exhaust you have to match the header collecter size, cat/test pipe size and remaiining b pipeing size (meaning youd want 2.5 all around) i had a 2in header and a 2.5in cat and bpipe when i upgraded the header to a bigger jdm size and heat wraped the headers i noticed a moderate gain from b4

 

so having 2.5 header to 2.5 test pipe to 2.36 muffler would be slightly better than 2.0 to 2.25 to 2.36 ? .. but it would be best to have 2.5 all around ?

 

2.5 all arounnnd

 

ya 2.5 might be cool but you got to be sure you dont lose to much back pressure. if you lose to much back pressure you start to lose power. and i know you dont want that. the good pipe size for a b series motor is 2 1/4.. unless you go turbo

 

this seems like the same question asked on team-integra.

Stick with the same size piping.

2.25 is good enough for i/h/e

2.5 if you going to build your N/A engine

Id say 2.5-3 for turbo.