I added SS short turn downs to the ends of SPELAB cutouts, to create a finished look - that not many people will see! The turn downs force the exhaust to flow toward the ground. The attached picture was taken during the install - all 2.5" S/S with x pipe - see how the exhaust exits straight out of the x pipe through to the cutouts. We had to modify the turn down's as their bolt pattern was misaligned with the SPELAB flanges...once modified everything fit and leaves for a clean look. The sound is amazing (loud) as the x pipe is right below the drivers/passenger floor. My '55 Chevy has a 350 zz4 crate with 750 CFM Demon carb (dual plane intake) turning a 292 Comp cam, flowing through RHS ProAction Aluminum racing heads that exhaust through to hand made (custom one off) headers - to SS Pypes (with x crossover) to SPELAB cutouts...LOUD when open, mellower when exiting the back of the car. I had cutouts that were broken and the SPELAB units replaced what was on the car, along with all new SS exhaust...all as an upgrade.