waste of $... do this... buy a 300 belt (size) and just not hook up your air pump. buy a midpipe for around a 100 bucks from gothamracing.com slap that on and feel the powa. it will cost about the same w/ a bigger performance gain... just put it back to stock when your doing emmisions.
My $.02 -wonder1and

I know by taking out the air pump you need a differetn belt. But a midpipe is nto required right, just performance? I could run without a air pump on stock midpipe right?

 

I guess you quoted wonderland (ryker). Kinda confusing.

"stock midpipe" is the main cat. You need the airpump to keep it happy. Without, your cat will prolly go bad, at least that is the urban legend

 

ok a friend has recently tried to find the belt to replace the airpump (only running waterpump and alt) but cant find a damn 30 inch belt anywhere around here. where did you guys find them?

 

dunno, stev at RR Rotary did mine. Goodfella i think you caugth me backwards. I'm trying to ask, can i run withot an airpump withotu havign to upgrade my cat? Actually i think yo answered my question ... i'm comfused ..*TEAR*

 

I ran my stock cat with no airpump for like a month with the GReddy pullies before I finally put a midpipe on. My cat seemed just fine.

 

I found my 300k4 at a truck and industrial machinery parts store.