Switching from X to H

I have SLP LT's, SLP o/r X, and and SLP LM cat back. I was wondering if anyone knew of a shorty o/r H-pipe that I'll be able to use with my SLP set up. All of the H-pipe set-ups I've seen have actual couplings, you can just clamp it to the LT's, unless you buy that same company's LT's. Any info let me know.

If any one wants this set up be prepared, its loud and raspy.

Thanks alot