X-Pipe (Cats vs Catless)

Sonics2042 · 06-27-2002, 12:19 PM

Hello,

Having a hard time decide. I want cats, but it is so much more expensive! Also, how much louder is the catless?

Which company has the best x-pipe? (Currently I have BBK headers and MAC exhaust).

Thanks,
DoranW

sn95gt19 · 06-27-2002, 12:24 PM

i had a bbk x pipe on my 89lx, it was pretty quiet just cruising but when you get on it, its gonna scream. if you have the extra cash i would go with the cats though, itll be quite a bit quieter and wont have to worry about good ol emissions.

Agent_4573 · 06-27-2002, 12:54 PM

I bought my car without cats and bought a summit h-pipe w/ cats to pass inspection. Performance wise, I think you can feel the difference. The catless seems faster. What ever you do don't get a summit h-pipe. The first time it came it didn't have o2 holes drilled in, then when it came back it was 1.5 inches short and the metal peices that go into the double hump were 6 inches to far forward. I ended up grinding off the double hump supports and had to pry and clamp my exhaust together, it was so tight. After about a month both muffler brackets broke so I passed inspection and put the offroad h back on.

Mr 5 0 · 06-27-2002, 03:55 PM

Sonics:

Your state requires emissions testing so you need catalytic converters, at least for the test.

I would just pop for the high-flow cats and be done with it as you don't lose that much power but if you go catless (H-pipes) then just install the cats at test time and remove them afterwards. Many Mustang owners in emission testing states do this successfully.

FYI: Unless they've stopped, Walker makes a high-flow catalytic converter system for under $300.

Sonics2042 · 06-27-2002, 04:34 PM

How does the quality compare? As much as I hate to spend money, it would be worth it to me to pay for BBK or something if it is superior. Thanks

DoranW

06-27-2002, 12:19 PM	#1
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	X-Pipe (Cats vs Catless) Hello, Having a hard time decide. I want cats, but it is so much more expensive! Also, how much louder is the catless? Which company has the best x-pipe? (Currently I have BBK headers and MAC exhaust). Thanks, DoranW __________________ What I have: 1990 Red Mustang 5.0 LX: [BBK X-Pipe]-[MAC Cat-Back Exhaust] [MAC Cold Air Intake]-[BBK Equal Shorties] [3.55 Gears]-[Cobra Intake Manifold (Upper and Lower] [E-303 Cam]-[Granetelli Mass Air Flow Sensor] [Front and rear sway bars]-[New black carpet and seats.] [Adjustable Fuel Regulator]-[T5 Conversion w/ K. Cobra Clutch/Hurst STS] [Cobra Throttle Body]-[130A Alt. Conversion] Thinking about: Aftermarket Heads! Vortech A-Trim

06-27-2002, 12:24 PM	#2
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	i had a bbk x pipe on my 89lx, it was pretty quiet just cruising but when you get on it, its gonna scream. if you have the extra cash i would go with the cats though, itll be quite a bit quieter and wont have to worry about good ol emissions. __________________ 95gt lazer red (98 cobra clone) Rice Haters Club Member #116

06-27-2002, 12:54 PM	#3
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	I bought my car without cats and bought a summit h-pipe w/ cats to pass inspection. Performance wise, I think you can feel the difference. The catless seems faster. What ever you do don't get a summit h-pipe. The first time it came it didn't have o2 holes drilled in, then when it came back it was 1.5 inches short and the metal peices that go into the double hump were 6 inches to far forward. I ended up grinding off the double hump supports and had to pry and clamp my exhaust together, it was so tight. After about a month both muffler brackets broke so I passed inspection and put the offroad h back on. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

06-27-2002, 03:55 PM	#4
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	Is your cat a dog? Sonics: Your state requires emissions testing so you need catalytic converters, at least for the test. I would just pop for the high-flow cats and be done with it as you don't lose that much power but if you go catless (H-pipes) then just install the cats at test time and remove them afterwards. Many Mustang owners in emission testing states do this successfully. FYI: Unless they've stopped, Walker makes a high-flow catalytic converter system for under $300.

06-27-2002, 04:34 PM	#5
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	How does the quality compare? As much as I hate to spend money, it would be worth it to me to pay for BBK or something if it is superior. Thanks DoranW __________________ What I have: 1990 Red Mustang 5.0 LX: [BBK X-Pipe]-[MAC Cat-Back Exhaust] [MAC Cold Air Intake]-[BBK Equal Shorties] [3.55 Gears]-[Cobra Intake Manifold (Upper and Lower] [E-303 Cam]-[Granetelli Mass Air Flow Sensor] [Front and rear sway bars]-[New black carpet and seats.] [Adjustable Fuel Regulator]-[T5 Conversion w/ K. Cobra Clutch/Hurst STS] [Cobra Throttle Body]-[130A Alt. Conversion] Thinking about: Aftermarket Heads! Vortech A-Trim

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