[jeanlucdckhard]

Originally Posted by mike@x-ph.com

pm sent

Can you tell me if there is a performance decrease in catted versus catless?? Thank you. Plan on buying one of these this year.

[Kevin39]

Obviously the high flow catted version is going to cost you something in performance but it would still be better than stock.

[mike@x-ph.com]

Originally Posted by jeanlucdckhard

Can you tell me if there is a performance decrease in catted versus catless?? Thank you. Plan on buying one of these this year.

Originally Posted by Kevin39

Obviously the high flow catted version is going to cost you something in performance but it would still be better than stock.

Correct catted will give less performance than catless ~10 whp

Also keep in mind not all catted are equal.. air flow will depend on what kind of cats is used

[Tiago@VRSF]

Here's a before/after dyno of our catted downpipe.

[GripAndRip]

Originally Posted by Tiago@VRSF

Here's a before/after dyno of our catted downpipe.

I asked this on the original thread where this dyno chart came from, Tiago do you have any comparison to your catless? Your site claims gains of 25-30hp (not stated as bhp or whp). Is that whp on your site?