Any real-world information about the cat-back from Holley?

 

I have not used a flowtech cat back.

but on my dads f-150 I used flowtechs afterbunner muffler also known as a iron tuff muffler and it sounded great until the baffles blew out.

I since have switched to flowmaster.

I guess I need to stop driving it with a lead foot.

 

Check April 2002 Sport Truck Magazine. There is an article, using a GM 5.3L engine.

The Dyno was from 3600 to 6000 RPM's. It gained about 6 HP. Nothing in the bottom end, tho'.

R1968

 

You won't get much feedback on this system until it has been out long enough to be commonly used and evaluated.