Trial and error

 

FYI. It's a Flowmaster HP2 shorty if you're still talking about the one I mentioned. Last couple posts you've referred to a SP2.

Will it work for you ? Hard to say because of your other mods to the intake and exhaust. Doubt you'll find anyone with the same engine, specific mods like your's and running that same muffler that can give you their thoughts.

I just mentioned it before because that Flowmaster worked out perfectly for what I was looking for. I went with that particular one based on member SS fan and his experience with the HP2's.
I was looking for a replacement muffler after being dumb enough to try the muffler delete. The drone from that mistake made me seek out a better replacement than putting back the stock "garbage can" sized one.

 

Ah, good catch. I will look up the HP2 muffler.

 

I posted the link for the HP awhile ago.

 

Right, I just looked up the wrong one when looking at flowmaster a main site to get more information.

 

Here's the Flowmaster site

Flowmaster HP-2 PERFORMANCE MUFFLERS

 

If I remember correctly, the HP in the mufflers name stands for Hushed Performance