Gutting out cats?
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Gutting out cats? - 5/8/2008 10:21:34 PM
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90notchLF
Posts: 86
Joined: 5/13/2006
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Went to the muffler shop today looking to replace my 4 cats. The guy there told me that instead of buying all 4 cats what they usually do with fox mustangs is that they gut out the two fron cats and leave them completly hollow but still on the car for visual inspection and install two high flow cats in the rear. The guy said this would give me more HP better fuel economy and would still pass California smog without a problem.
Has anyone here ever done this or heard of this and if so is it true?
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RE: Gutting out cats? - 5/8/2008 10:49:46 PM
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FuzzyDiceRule
Posts: 2026
Joined: 6/27/2005
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or just buy a 2 cat midpipe, which is still legal, i dont think you have to have the front 2 to pass visual, i doubt half the tards doing it even know about them
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1992 Mustang GT: 5.0, 5 Speed
1969 Mach 1: 351, 5 speed
1971 Chevelle SS 454; 454, TH400 Auto
454ci club- member #2
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RE: Gutting out cats? - 5/8/2008 11:36:04 PM
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90notchLF
Posts: 86
Joined: 5/13/2006
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The guy is charging me $500.
Has anyone had any experience with gutting the two front one's out out?
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RE: Gutting out cats? - 5/9/2008 7:45:26 AM
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ACE
Posts: 1035
Joined: 7/20/2005
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http://www.jegs.com/i/BBK/129/1521/10002/-1/747929|11525
Just a heads up and quick search, it is cheaper to buy a bbk off of jegs and install it yourself then to have them do it. And gutting those cats will create a turbulence in exhaust and make it sound weirdd!
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^^ will trade for Terminator or Mach 1
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RE: Gutting out cats? - 5/9/2008 7:54:13 AM
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USMC1775
Posts: 421
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+1 definitely buy an OR pipe. It makes it sound better, its easier, cheaper, and when you need to smog, you change it out in 20 min.
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RE: Gutting out cats? - 5/9/2008 9:11:46 AM
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primo232
Posts: 23
Joined: 8/24/2006
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It doesn't make good sense to pay $500 to a muffler shop to do that when you can buy a street legal catted x or h pipe and install it yourself. Get a nice set of headers with the $100 you'll save.
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1990 GT, TFSH Top, Stock Bottom, Custom Chip/Tune, 1.7 RR, BBK 70m TB, Lighting MAS, CAK, 3 core radiator, HF WP, 180 TStat, 190L Fuel Pump, CFDF Clutch, TR 3550, Hurst Shifter, 3.73 Gears, BBK H-pipe, FM exh, Subframe Conn. Max Pwr 320.5(HP)@5300(RPM)
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RE: Gutting out cats? - 5/9/2008 11:25:03 AM
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7upedition
Posts: 3845
Joined: 5/24/2005
From: Central New York
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I agree with getting a catted H or X pipe, aftermarket, gutting a stock one is more work than its worth, in my opinion. Good Luck
California emissions suck 
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-Jason
25th Anniversary 7UP Edition LX Convertible
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RE: Gutting out cats? - 5/9/2008 5:31:53 PM
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94StinkinLincoln
Posts: 1643
Joined: 12/7/2006
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i gutted mine, its sounds good actually, but since i have a stroker motor, i need more flow, 2.5in o/r h for me now :)
it has that real sleeper look lol
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