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nkaminar · 01-07-2026, 05:57 PM

If the fit at the exhaust pipe to manifold junction is proper, gaskets, sealants, and pipes are not needed. Holding up the exhaust pipe with a floor jack is fine to fit the clamp in place, but remove the jack when you tighten the clamp and wiggle the exhaust pipe back and forth as you tighten the clamp to make sure the exhaust pipe is lined up correctly.

Yes, the pipe inside the manifold and exhaust pipe will add restriction, but you probably will not notice it except at very high rpm, and then only if you have a high flow carburetor and high flow muffler.

The studs and nuts are the same as used on the head. If the parts are new or in very good shape they should be able to go to 55 foot-pounds. I agree that 25 is too low. And I would say that 35 is too low. If you don't want to go to 55 then at least go to 45. And re torque like you do with the head nuts.

01-07-2026, 05:57 PM	#16
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 6,856	Re: Manifold Replacement If the fit at the exhaust pipe to manifold junction is proper, gaskets, sealants, and pipes are not needed. Holding up the exhaust pipe with a floor jack is fine to fit the clamp in place, but remove the jack when you tighten the clamp and wiggle the exhaust pipe back and forth as you tighten the clamp to make sure the exhaust pipe is lined up correctly. Yes, the pipe inside the manifold and exhaust pipe will add restriction, but you probably will not notice it except at very high rpm, and then only if you have a high flow carburetor and high flow muffler. The studs and nuts are the same as used on the head. If the parts are new or in very good shape they should be able to go to 55 foot-pounds. I agree that 25 is too low. And I would say that 35 is too low. If you don't want to go to 55 then at least go to 45. And re torque like you do with the head nuts. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. Last edited by nkaminar; 01-07-2026 at 06:06 PM.