Tbred911

http://www.cheetahonline.com/products/n8039.html

Has anybody ever done this for their 996 ? curious to hear from somebody who installed one of these...

100plus

Interesting ... That also means you have to change the belt.

carcster88

Never installed one on a Porsche but on other cars...they do not do much at all. I say save your money.

Shark Attack

I saw a thread on the boxter forum. I think it make 5 HP? IIRC

LVDell

It's not that it makes noticeable hp but that it helps keep your ps pump from burning up on track. And yes, you need a new belt that is proper sizing. Did this on my Spec Boxster. Let me know if y'all want to see before and after pics.

RPMulli

I've heard that it puts an unnecessary strain on the alternator?? and they slow down your water pump thus raising engine temps?

TRT41

only needed if you are racing or doing a lot of serious track time.

Byprodriver

Beware of the Cheetah he is often missing in action for long periods of time!

Ahmet

Though $200 is not bad for a good quality under drive pulley, it'd be better spent towards a track event IMO, particularly for a street car.

himself

Are you boiling your power steering fluid on track? If not, skip this.

-td

[I don't get all this recent traffic regarding underdrive pulleys lately...]

TRT41

internet wizards...they put odd thoughts in one's head.

mglobe

There's the answers. Next topic.

Tbred911

ok thx for the insight guys.

cardsrule

We use them on all our race cars. My no BS .02 is way over kill for a street car. What they don't tell you is most (no idea about this pulley) under drive pulleys require you to cut down the TDC boss. Its not a big deal but something you should know about.

Tbred911

your BS .02? overkill... why?

what is a TDC boss?

how much extra hp/torque do they give you... is it more on top end...?