Quote Originally Posted by emmerich5.3 View Post
Not trying to thread jack here, just was wondering what gains you get out of switching to the TBSS intake. Also, why can't you use the stock return style truck rails?
You can use the 87mm or 90mm throttle bodies, intakes supposedly flow better too. I did notice much better throttle response after the install and retune.

The rails that fit the TBSS intake are returnless and don't have a regulator built in. You can use the vette filter, modify them, or use aftermarket rails.

04+ with the returnless rails you don't have to do any of that, it will plug right in.