I have a IS250 and I was wondering if I got Exhaust and Intake, how much faster would it make the slow IS250? If anyone has experience or know any of these information I would appreciate it.

 

I only have tanabe exhaust..and I havent done any dynos or feel any increase in power.. my wild guess would be <5hp? and an intake would be <5hp too?

so total is at most 10 hp?

 

Yeah.... intake will be 0-5 hp depending on conditions (arguably negative gain for an open-filament intake from a stop)

Exhaust will be maybe 5-7 hp for any street-legal axle-back... maybe a couple more (on a 250) for one of the illegal full exhausts that delete the 2nd cats

 

add headers and you can get around +30~ hp gains

 

This is what you need!! Mazzuri super headers FTW!!

 

I don't think intake/exhaust for our cars would make much of a difference..I'm assuming about 10hp max is what i'm getting with intake + exhaust

 

for the price of an intake and exhaust.. get the mazzuri headers instead!

 

Mazzuri headers=