Mac Off Road Pipes?

M.Ozzy · 01-04-2004, 03:11 PM

I am about to order the Mac Off Road H pipe. Was wondering if going catless on a stock engine is a good idea. Should I expect a loss of power because of decreased back pressure? Any thoughts about these pipes? I know a lot of people out ther are using them any feedback is appreciated. Thanks - Mike

Hazman · 01-04-2004, 03:59 PM

I put a Mac O/R H-pipe on my 97 along with Steeda underdrive pullies. Dyno says I gained 22 RWHP. Dragstrip says I cut 0.4 seconds off my 1/8 mile time.

tcrews · 01-05-2004, 09:06 AM

No, you will not lose any power from "decreased back pressure".

You'll gain both horsepower and torque throughout the rpm range.

laserred · 01-06-2004, 10:15 PM

Go without cats if you can get away with it. I currently have a Bassani xpipe without cats and I previously had them. I changed and won't go back if I can help it. I am in the process of switching out my whole exhaust though, and will be sporting a new BBK exhaust with full length ceramic headers and a shorty NO cat BBK x pipe, and 2 and a half flow master mufflers and tailpipes. I am looking forward to the sound , but with emissions laws changing in the next few months in NC, I will probably buy the shorty xpipe with cats to change when needed. Good luck

01-04-2004, 03:11 PM	#1
M.Ozzy Registered User Join Date: Sep 2003 Posts: 5	Mac Off Road Pipes? I am about to order the Mac Off Road H pipe. Was wondering if going catless on a stock engine is a good idea. Should I expect a loss of power because of decreased back pressure? Any thoughts about these pipes? I know a lot of people out ther are using them any feedback is appreciated. Thanks - Mike

01-05-2004, 09:06 AM	#3
tcrews Moderator Join Date: Jun 2001 Location: Lexington, SC Posts: 878	No, you will not lose any power from "decreased back pressure". You'll gain both horsepower and torque throughout the rpm range. __________________ Tom Crews 1997 Cobra Coupe #3672, SCMC #82 571 rwHP 462 rwTQ ------- 1998 Cobra Convertible 264 rwHP 268 rwTQ Tom's SVT Cobra Page

01-06-2004, 10:15 PM	#4
laserred Registered User Join Date: Aug 2003 Location: rockingham county N.C. Posts: 68	Go without cats if you can get away with it. I currently have a Bassani xpipe without cats and I previously had them. I changed and won't go back if I can help it. I am in the process of switching out my whole exhaust though, and will be sporting a new BBK exhaust with full length ceramic headers and a shorty NO cat BBK x pipe, and 2 and a half flow master mufflers and tailpipes. I am looking forward to the sound , but with emissions laws changing in the next few months in NC, I will probably buy the shorty xpipe with cats to change when needed. Good luck __________________ " Sidewindingly Slitherous ! " 373 gears, aluminum drive shaft, Granetelli lower control arms,ggrip caster camber plates, Hurst shifter, Eibach sportline springs, cold air intake ( Fender mount ) march under drive pulleys, K & N air filter, Superchips custom chip, BBK full length ceramic coated headers, BBK shorty X-pipe W/O cats, O2 sensor extenders , 2 chamber flowmasters and 2 & 1/2 inch tail pipes, Nitto 555R drag radials.

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01-04-2004, 03:59 PM	#2
Hazman Registered User Join Date: Sep 2002 Location: Harriman, TN Posts: 823	I put a Mac O/R H-pipe on my 97 along with Steeda underdrive pullies. Dyno says I gained 22 RWHP. Dragstrip says I cut 0.4 seconds off my 1/8 mile time.

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