so i have looked for a DYNO thread for us Second Generation IS's and cant seem to find one.

is there one ? I'm looking for what was installed and your dyno numbers.

 

There are very few mods available for the 2IS that add horsepower, so not many guys get dynos. There's a number of threads where a given person did something and posted the dyno of it (sometimes with a before one) but not one single "post your dyno" thread because it'd be fairly pointless.

All else being equal they'd all look about like this:

Stock: 265 rwhp
Intake: +5 hp
Axle-back exhaust: +7 hp
midpipe: +2 hp
"full" exhaust: +10 hp
Headers: +12-18 hp


and that's about it.

(there's been a couple guys with supercharger installs, but you can literally count them all on one hand as the bang for the buck is horrible)

 

thanks kurtz -

 

Oh, addendum- the 265 rwhp number is for an IS350 of course... IIRC the IS250 comes out around 175-180... the "gains" chart is roughly accurate for either model from what I've seen though.