Anybody notice a perf. diff. when removing thr cat

[85_305]

Just curious to know if anybody noticed a diff removing or upgrading their current cat to a hi-flow cat??

Matt

[bracketracer]

I noticed a little bit of a difference when I upgraded my exhaust from factory to a Hi-flo cat and 2.25" system and turbo muffler. It mostly just sounded better though. Last week I upgraded to a 2.5" system with mandrel bends, no cat, and a Dynomax Turbo muffler. Holy crap did I ever see an improvement! Even though I have nearly 152,000 miles on my motor, I set a new 1/4 mile mph record with my car 88.60, and I was consistently running at least 2-3 mph faster than in recent years. I thought the old system was enough to let the engine breath, but it obviously wasn't. I wish I would have gone 2.5" with no cat years ago!

[85_305]

Huh no kidding.. neat stuff. I actually just turned 153k the other day as i was pulling into my driveway from a Cruise Night haha. But I am not sure what size my exhaust is.. it's not factory, but i doubt it's 2.5". Thanks for the input though man.

[MATT2007]

I took mine out and put in a glasspack and I noteced a little improvement but I also have stock 2 in tubing till I can aford my dual setup

[Azrael]

There was a dyno test in one of those import mags about that difference. There's a link to it somewhere in this forum. The difference between a hi-flow cat and just pipe was all of 1 or 2 HP more for the straight pipe.

Edit: found the link: http://60degreev6.com/showthread.php?t=35519

[85_305]

There was a dyno test in one of those import mags about that difference. There's a link to it somewhere in this forum. The difference between a hi-flow cat and just pipe was all of 1 or 2 HP more for the straight pipe.

Edit: found the link: http://60degreev6.com/showthread.php?t=35519

A 1.0 liter honda is a bit different than an American motor