how much extra power ...

[gwhisky]

hi all,
i am thinking to install a header and catback into my auto jazz...
just wonder how much extra power will the exhaust system give to the jazz?

thinking a 5zigen header + catback...with stock cat

thanks all~~

[[ricer]]

the stock cat is pretty restrictive
u might as well get a hiflow or metal cat while your at it

as for gains im not too sure

[shadou]

would you bother?

[UBH320]

you can gain quite noticeable power on lower RPM... changed my header and hiflow cat but no b-pipe (power loss at below 3000rpm) crankshaft pulley, Apexi SRI... these can get your jazz to 67.9kw at front wheel like mine or 65.7kw at front wheel with b-pipe but no pulley and with TODA CAI... if you want prove I can post you up mine and friend's jazz DYNO graph...

[bennjamin]

extra power ? in real life , on the dyno - no extra power. Maybe a few kws if you spend big on a aftermarket ECU and tuning. You will only feel
alittle more pull.

[gwhisky]

thx all ~~~

[UBH320]

go check out one of the past event Melbourne Dyno Day or something... and see the different between the two jazzes... the white (UBH320) is mine and the silver (UCH...) is a friend's car... it clearly shown which car with what mods has less/more power gain...

I think its better if you try it out yourself...

**oh I was once told by someone, by adding - a/m header, hiflow, cat, vafc II + tune will gain 15kw???** I'm not sure if that possible or not...

[magii]

would you bother?

why post for if you got nothing to contribute?

and yes having a header + exhaust does give it a bit of an extra power, but dont expect too much.
main thing is that it revs smoother and faster in the high end