I purchased a thermal axel back a few months back because I got a great deal on it. I intended on buying the entire cat back but was short with money at the time. Thermal doesnt sell just the b pipe and now I dont know what to do. Buying a whole new cat back is my absolute last resort but I dont want to spend $500. What cheaper methods are there whereby I will still get good results? Get the bottlenecks taken out of my stock b pipe would be hard too unless someone know of a place to send it in to do that. My area sucks when it comes to muffler shops. What other suggestions do you guys have? If I must, which cat back should I go for? I have the comptech header and i wanna stay with a stock cat. Thanks again!

 

UH..........No muffler shops to make a custom 2.5 bpipe........hmmm......find one online i guess. Look in classifieds. Go to the nearest town or something.

 

Isn't the biggest bottleneck at the cat flange on our bpipes? I know that SMSP makes a "reducer" but you'll need to find a muffler shop to hack the flange off and weld on the reducer.

Now, is it possible to lets say ... dremel or port the flange to make the ID bigger? Just wondering.

 

send a PM to SMSP on this board. he can help you out. you will need the B pipe adapter which the muffler shop will hack off a portion of your B pipe and weld this new piece on (to rid the bottleneck). Might as well get a high flow cat and you will be set (do it all at once). You will notice a big difference with a high flow cat + B pipe adapter especially if you have mods such as I/H already. hope this helps

mike