2 1/4 or 2 1/2 pipe
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Joined: Dec 2002
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2 1/4 or 2 1/2 pipe
I am about finished with a frame off restoration, time for exhaust. The truck is 1979 4x4 F-250 with a 400, Weiand 4v intake, Holley 600cfm 4 barrel, headers 1 5/8" into 3" collectors. plan to run true dual stainless steel with ss mufflers. My question is what size piping should I use. Don't want to lose any power/torque or make a mistake with oversized pipe.
thanks
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Posting Guru
Joined: Mar 2002
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From: CA
2 1/4 or 2 1/2 pipe
If you're going to stay right there as far as engine performance, you'd be fine with 2.25. But if you ever plan on putting a better cam or anything else in, step up to 2.5" Sounds like a cool truck be the way!
Posting Guru
Joined: Aug 2002
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2 1/4 or 2 1/2 pipe
I agree. Go with the 2 1/2's. I'm running dual 2 1/2's off my 400 in my 79 250 and it sounds goood! Power is good too, esp for being mainly stock. My 78 Bronco has 2 1/4's coming off it's 400 and it sounds good, but not as good as the 2 1/2's.
79 250 Ranger Lariat 4wd 400 C6 3.55's 33x12.50 16.5's
78 Bronco Custom 4wd 400 C-6 3.50's 31 10.5 15's
66 Mustang Coupe Sports sprint 200 c-4 cruise o matic 3.00's
99 Grand Prix GT 230 ft/lbs torque out of a non turbo'd 6 cyl hehe
79 250 Ranger Lariat 4wd 400 C6 3.55's 33x12.50 16.5's
78 Bronco Custom 4wd 400 C-6 3.50's 31 10.5 15's
66 Mustang Coupe Sports sprint 200 c-4 cruise o matic 3.00's
99 Grand Prix GT 230 ft/lbs torque out of a non turbo'd 6 cyl hehe
