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Dec 29, 2005 | 09:45 PM

#16

kb1aah

Senior User

Joined: Apr 2004

Posts: 181

Likes: 0

From: Florida

My stacks are from Grand Rock also. I haven't seen any ill effects of running without the CAT converter. The turbo sure sounds a lot nicer without the CAT.

I get asked if I have recently slipped a jet engine under the hood.

Dec 30, 2005 | 07:22 AM

#17

04Muscle350

Senior User

Joined: Oct 2005

Posts: 161

Likes: 0

dont cut it apart. all i did was get a big drill bit and drilled some big holes into the honeycomb which lossened it up a little bit. then i got a crowbar and just knocked it out. it took under 10minute.

Dec 30, 2005 | 07:54 AM

#18

keeno

Junior User

Joined: Jul 2005

Posts: 53

Likes: 0

From: Jerkintown, PA

5 years back i had a ricer and took off the cat to run a straight pipe. it sounded good for a rice rocket, but i lost power. it wasnt creating enough back pressure and made the car even slower then before. does the same thing not apply with a diesel? sorry i dont know this

Dec 30, 2005 | 12:56 PM

#19

XxfirmanxX

Senior User

Joined: Oct 2004

Posts: 122

Likes: 0

From: FREELAND

My buddy has a 05 with a 5" bully dog no cat sound sick and a good rummble when he get on it but he's also running the edge juice with more goodies than i can afford.I just bought the 4" MBRP turbo back with the cat delete pipe will post a sound clip when I get it installed wont be here till middle of next week.

Dec 30, 2005 | 04:02 PM

#20

04Muscle350

Senior User

Joined: Oct 2005

Posts: 161

Likes: 0

i dont feel a lose in power at all

Dec 30, 2005 | 04:12 PM

#21

big inch

Elder User

Joined: Apr 2005

Posts: 907

Likes: 2

From: Jackson, TN

Quote:

Originally Posted by keeno

On a turbocharged engine, anything you do to free up the exhaust (or intake) will help. That is not always the case with a naturally-aspirated engine, as you found out.

Dec 30, 2005 | 06:40 PM

#22

mattsf250

Elder User

Joined: Nov 2003

Posts: 987

Likes: 3

From: Bass Lake, CA

if you have an 03, i would simply add a downpipe, and remove the muffler.

see how ya like it. this mod is about 150-200.... and sounds impossibly good, even with a functioning converter.

next, remove the cat with a test pipe, see how ya like it.

If you have an 04 to 06, you need a total 4" from turbo back, and out the back....