which is better?
Supreme Member

Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
The open lid, are you referring to the X-Treme lid. For that to be beneficial you need some time of cowl induct hood or ram air for the air to enter the top.



