well everyone swears by "ATI" ud pulleys, I have a BBK underive which I heard is identical to the summit one..

But If I had to guess, I would say the ls6 intake/ported tb/ud pulley would be worth around 10-20 hp

 

Ill have to look into those right quick

 

So is 25% the one to get

 

An SD tune vs keeping the MAF if just a preference in driveability, cleaning up the engine bay and haveing one less thing to break. There are no power gains to be had with one or the other.

 

Whats the driveability differences? Pro cons?

 

the ATI is 10% not 25%

 

On there site they have a 25%

 

The biggest con will be temperature variations. If you live in a place that gets very cold in the winter and it's your daily driver there's nothing on the car to compensate for that. Some people love them, I've never had an SD tune personally so I can't speak from experience.

 

hmmm

 

Procharger D1SC

 

This is where I saw it...
http://www.atiracing.com/products/da...ts/damserp.htm