Installed this with a Viggen clutch and it's not really noticeable when it comes to the revs. I noticed a much bigger difference when putting one in a Dodge Neon VS putting it in the Saab. But, I have noticed the revs drop quicker, but as far as revving up faster in neutral, it's not very noticeable. Definitely worth the upgrade overall though. I have noticed a marked improvement in my gas mileage, which could be attributed to the new clutch.

Rating: [4 of 5 Stars!]