🚀 Flowmaster 12518409 Super HP-2 Muffler 2.50" In/Out 18" 409S - High Performance Muffler for Enhanced Flow Review

Excellent quality product to fit a 2009 Ford F-150 5.4 with some modifications. It has a pleasant deep sound, almost no rumble in the cabin. would recommend.

Fits Jeep LJ, a little louder than we wanted but fits with long arm suspension kit and sounds much better and more powerful than installing local mufflers in China

The sound is deep and not too loud. Installed on a supercharged Jeep 4.0. Unfortunately it doesn't flow well enough. It's only at 3800 rpm and pressure above 6 psi that the tone changes from a 60's hum to a loud hiss. Big disappointment, the sound is amazing at low revs and boost. It would be great for a naturally aspirated Jeep.

A bit expensive. But they have really cool body technology, I have very little space on my Land Cruiser and I was able to fit them on either side of the drive train. The sound is also very pleasant, a bit loud at full throttle.

The sound is deep and not too loud Installed on a 4.0 supercharged jeep Unfortunately there is not enough flow The strong tone buzzer works great at low revs and on boost. It would be great for a naturally aspirated Jeep.

I built a custom exhaust for my Subaru Impreza and used this HP2 along with a Flowmaster resonator and a 2.5" Flowmaster bent shaft universal pipe kit. Now my baby can breathe! The UEL headline is looking for that boxer rumble and the stock exhaust choked it to death. Very happy with this facility. The HP2 has an amazingly deep, throaty sound and is quite compact. Excellent quality!

Very good construction. However, this should not be considered a silencer, it is definitely a resonator. If this is going to be a daily driver of any kind, consider putting a sizeable muffler behind it to keep the noise level bearable. No one really said Flowmaster put this muffler on the quieter side of their line in the reviews. I know it has a laminar core, but it sounds sonically the same as a glass bag of the same length, but it seems to have a lot less pop when it slows down. So that's a…