imported_magicguy

just wondering. If I put a stock axle back 2" with fully 2.5 header to midpipe...will that harm the engine since the exhaust pressure goes back to the motor everytime i let go of gas? correct If Im wrong

imported_egb18c

ideally you would want 2.5" all the way through

imported_magicguy

yes. but I will have to replace my current axle to a stock one for a short time period, the one i have now is too damn loud. so...will 2.5--> 2.0 will harm the motor?

imported_Kingjames1983

no it wont harm your engine... it will choke off a bit of power but I highly doubt it will harm your engine.

Nova_Dust

No harm in that. If anything, I find smaller diameter pipe will yield a bit better low end torque. Of course, you suffer top end power but you gotta do what you gotta do.

imported_mikepasini

hahahaha.... hahahahaha...

oh wow, you guys have never seen my exhaust then...

i am running a stock cx d-series exhaust on my gsr right now. you worried about back pressure with a 2 inch? lol.

i make no power after 6k. lol.

imported_Kingjames1983

Thats funny, on my B16a with stage 2 cams, upgraded valvetrain, cam gears, tuned ecu, shave head, ported, 3 angle valve job, tuned ecu blah blah blah I have the stock SI exhaust because I dont want the loud annoying sound!

imported_mikepasini

honestly man, run a 2.5" and you will feel the difference. its not like upgrading an exhaust you might feel a little.. but imaging how much it gets choked at like 8k... with a 2.5" you feel a nice increase in pull right to the top.

imported_Kingjames1983

yeah I know.... I think I am going to go with the DC header I have cause it was only $50 and then the setup from there is all 2.5 vibrant with there new super quiet resonator, and the flat black muffler to end it... what do you guys think?

imported_mikepasini

i love the vibrant stealth blacks... they are real nice.

i would probably run it without a cat, but I just like shooting flames out the back. thats all.

just keep it min 2.5" and go mandrel bent for the piping, because with i believe its called crush bent or something like that, the flow wont be as direct since it narrows at the bends.

Oldspower

why would a stock exhaust damage an engine lol.

imported_mikepasini

unless the dc header is a true 2.5" collector, ii would sell it to someone else with a stock b16. you want a 2.5" collector and 2.5" after that and you will have the best flow... i believe the d headers taper down to 2.25" and i wouldn't want that.


like a jdm 4-1 type -r header or even the megan racing ones would do for a reasonable price.