Stock.....

[Black Stang 97]

Well im heading to the race track in a few hours, and i have my stock cat back disconnected, my pipes end right after the H pipe, am i losing power??, if so, so i can connect them b4 i go to the track or am i gaining a little the way they are disconnected?? I need ur inputs!!

 

[Mustang5L5]

You'll lose some torque without the mufflers, but gain some HP.

At the dragstrip, you'll most likely run a tiny bit slower.

I'd reconnect the cat-back, because as the old saying goies "HP wins trophies, but torque wins races"

 

[hotmustang331]

^Huh, how can you win trophies W/O winning races?Bracket maybe LOL...anyways if its the stock CB its probably pretty restrictive so I doubt you will see any sort of difference between the 2...if any, W/O will make you trap higher, W/ will result in a better ET.Maybe.