65 289 Exhaust

mmeany · 07-06-2000, 11:29 AM

Anybody have any suggestions on exhaust? I have a warmed over 289 (600cfm carb, headers, cam, 040 over, etc) and am looking for a dual exhaust system. I am considering a nickle plated one from one of the Mustang vendors, do they fit well? Or would I be better off getting one custom bent? The local muffler shop can go to 2.5", is this big enough or should I try to go bigger? If I went this route, I would use the flowmaster mufflers. Any suggestions?

66fastback · 07-06-2000, 12:10 PM

2 1/2" pipes are absolutely the largest I would consider. I've tried 2" and 2 1/4" and both work well on a 289 or 302. 2 1/2" pipes will kill low end torque, and unless your revving past 6k, I don't think you'll find any benifit to them. My car runs pretty good with the 2" on there right now, but I'll probably go with 2 1/4.

Nos351C · 07-06-2000, 03:00 PM

I would definitely go the custom bent, local muffler shop route. The kit systems are fine, but most of the time you can get a setup that is bent to fit your car for the same price. As for size, I would go with 2&1/4 if your car will remain with that engine combination.

------------------
Marcus
68 Mustang giggling 351C coming soon

Gearhead999 · 07-06-2000, 08:40 PM

My 68 is a 289 bored .060, roller cam, roller rockers, ported heads with 1.94 valves. Hooker headers and 2 1/2 inch mandrel bent pipes all the way out and the factory dual tips are welded on the ends.
Flowmaster 3-chamber mufflers. The car is an AOD with 3.50, 9-inch rear. Car runs very good, sounds VERY GOOD. But, believe me there isn't any room for a larger dia. pipe.

------------------
Dave Pitt
68 FB, 289
Dual AFB's

07-06-2000, 11:29 AM	#1
mmeany Registered Member Join Date: Jul 2000 Posts: 6	65 289 Exhaust Anybody have any suggestions on exhaust? I have a warmed over 289 (600cfm carb, headers, cam, 040 over, etc) and am looking for a dual exhaust system. I am considering a nickle plated one from one of the Mustang vendors, do they fit well? Or would I be better off getting one custom bent? The local muffler shop can go to 2.5", is this big enough or should I try to go bigger? If I went this route, I would use the flowmaster mufflers. Any suggestions?

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07-06-2000, 12:10 PM	#2
66fastback Registered Member Join Date: Mar 1999 Location: Dallas, TX Posts: 208	2 1/2" pipes are absolutely the largest I would consider. I've tried 2" and 2 1/4" and both work well on a 289 or 302. 2 1/2" pipes will kill low end torque, and unless your revving past 6k, I don't think you'll find any benifit to them. My car runs pretty good with the 2" on there right now, but I'll probably go with 2 1/4.

07-06-2000, 03:00 PM	#3
Nos351C Registered Member Join Date: Jun 2000 Location: Bay Area CA Posts: 61	I would definitely go the custom bent, local muffler shop route. The kit systems are fine, but most of the time you can get a setup that is bent to fit your car for the same price. As for size, I would go with 2&1/4 if your car will remain with that engine combination. ------------------ Marcus 68 Mustang giggling 351C coming soon

07-06-2000, 08:40 PM	#4
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	My 68 is a 289 bored .060, roller cam, roller rockers, ported heads with 1.94 valves. Hooker headers and 2 1/2 inch mandrel bent pipes all the way out and the factory dual tips are welded on the ends. Flowmaster 3-chamber mufflers. The car is an AOD with 3.50, 9-inch rear. Car runs very good, sounds VERY GOOD. But, believe me there isn't any room for a larger dia. pipe. ------------------ Dave Pitt 68 FB, 289 Dual AFB's