Steeda underdrive pullies = how much RWHP?

saxmanJJ · 02-25-2007

How much extra rear wheel horsepower could I expect to gain just from adding Steeda underdrive pullies?

I currently have a 2004 Mustang with a 5-speed, with 3.73 gears, a CAI, 70mm throttle body, BBK upper plenum, flowmaster mufflers, and a SCT dyno tune, and am making 247 RWHP.

Thanks in advance!

**EagleAutosports** · 02-25-2007

I would guess around 3-5 hp, no more.

GTRmustang95 · 02-25-2007

i think the most i have ever heard anyone gain is like 10rwhp, from steeda udp.....but i would expect to be somewhere in the 5-10rwhp range. Let us know if you get them and dyno the car after !!!!

do you have a aftermarket midpipe? like a xpipe or a h pipe?

steelo00Gt · 02-26-2007

It's mostly a seat-of-the-pants difference. You quickly forget you have them, but by all means get you a set.

aacuna · 02-26-2007

I had the steeda udp and there where only 3hp in gain
I had to get rid of it 2 mont, after i got them because i was
having charging problem, the cost me an alternator
steeda udp are ****

GTRmustang95 · 02-26-2007

REALLY accuna? Thats the first complaint out of alot i have heard about steeda. Their pullies are one of the best out for our cars. Did you have a system(as in subwoofers and a amplifier) in the car?