WJ SOM SS

iTrader: (11)

Anyone seen any real gains running gutted cats on a '01-'02 F-body w/stock exhaust manifolds and a aftermarket Y-pipe? Thanks. WJ.

TheDogofWar

iTrader: (2)

IMO, theres no way the gains will make it worth the terrible sound you'll get.

ZippyZ28

Last fall I was running 13.0@109, this spring first time out I ran 12.4@113.8, only mods over the winter were MAFT and Gutted Cats...The MAFT only was used to compansate for my MAF ends so it is 5% rich on the base. I don't know which of those two mods made the difference but what a difference it made.

dug

iTrader: (10)

WJ

Are you still interested in the offroad pipes? Theyll make more power than gutted cats. The cat pipes are only 2 1/4" in diamter whereas the mufflex pipes are 2 1/2" diameter. Also, port matching the exhaust manifolds to the offroad pipes will add some power as well.

CAT3

iTrader: (9)

Who(sponsors) carries the Mufflex ORP's? TIA.

Jpr5690

iTrader: (13)

thunder racing and slp both told me they dynoed stock cars with and without cats and they both said there was no gain and this was in the same conversation that i was tring to buy the bassani offroad y pipe from thunder. their good guys, i mean how many retailers tell you when a product they stock sux. im very impressed. but do as you want you will defnately get more noise and mabye 1 or 2 hp

redsscamaroboy

iTrader: (7)

I gutted my cats and found no gain at the track and the only true difference was a terrible sounding exhaust note afterwards. I am adding longtube headers and y-pipe to fix this nasty exhaust sound. Sounds like crap at start up. after that the sound is really just hollow. My opinion is DON'T DO IT ! I wish i never did. Hope this helps you figure out what to do.

2001SS#3013

iTrader: (2)

I picked up 7 RWHP by putting gutted cats on my car. I had the Mufflex Bypass pipes and they sound terrible. Then I picked up a set of gutted cats and put them on. They sound good in my opinion. I also have the loud mouth with the dynomax muffler in place of the resonator. What ever you do, DO NOT buy the mufflex. They cost too much and sound like A$$.

WJ SOM SS

iTrader: (11)

Zippy Z28: You sure that's all you did? The translator and gutting the cats? That's almost unbelievable...What are you running for a catback? WJ.

Drew778

iTrader: (2)

I'm going to be doing pretty soon, I have a set of gutted cats form a friends car, just need the gaskets.

I also have an SLP y-pipe and a Magna Flow cat-back.

I should find out this weekend, my best so far is 12.4 @ 108 n/a

Hoping to see 12.3 @ 109

01redws6ta

I gutted my cats a month ago and can't offer any performance numbers, but it didn't make a noticable difference. I think the exhaust note sounds alot better (deeper). It sounds more like a 10.1:1 compression engine now. It has no rasp at all. My other exhaust consists of stock manifolds, SLP y-pipe, stock intermediate pipe (2.75"), and Flo-pro muffler w/stock tailpipes. I was going to get the Hooker catback system, but I'm afraid it might make it sound bad??? So, in conclusion I like the sound of the gutted cats.

2000Z28M6

iTrader: (13)

I have the stock exhaust manifolds and had my cats gutted about 3 weeks ago at a local muffler shop that will remain nameless, I had them build me 2.5in mandrel bent y-pipe into a 3in collector that continues into my Hooker Catback. I dont have a dyno, but exhaust velocity was definitley increased and HP raised about 8-10 HP. The sound is pretty loud at WOT. and it sounds deeper and louder at 2000 rpm and up, than before. Its not drony it just sounds less restrictive, I like it so far. All said and done $200.00 labor and parts absolutley Bang for the Buck Mod. Headers can wait for now.