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Hi everyone, I'm trying to figure out what header gaskets I need for my 76. There is a so much data out there that it's getting mind boggling so I thought I'd just ask. I don't have any idea what brand my headers are. They came with the car.
Can anyone confirm the port for my header in the attached picture is considered "round"? Also, how do you measure the port sizes? What would be a good choice for a replacement gasket for a stock street car? Thanks.
Looks like I'm barely seeing "Cyclone" and "Engineered by..." stamped on the side of one of the headers. How do I measure the ports? Would mine be considered round from this picture?
Took one of my headers to a Speed shop here in town to get sized up for gaskets. The guy there was delighted to see the "Cyclone" header. He says they were pretty popular in the eights/early nineties but went out of business. He was just as confused as hell as I am as to whether the header ports are "round" or "d" shaped. Lol!
1404 Fel Pro exhaust Gaskets, Steel Core Laminate.
Yes.
Don't get hung up on if it is a round or D port.....you are not sealing the port....you are sealing the welded ring that is ground flat. If anything, that is what you measure.......
The Speed Shop guy is right....Cyclone were huge in the 80's........
Hi everyone, I got my header gaskets, coated the headers and they are ready now to be reinstalled. I'm wanting to confirm what the flange and collector bolts be torqued at? Any particular sequence? Thanks.
Last edited by hgoodwiniii; Jun 30, 2023 at 05:21 PM.
It should be torqued at: "Lil - Past - Snug".
It also depends on the cyl head material.
On the Intake bolts anyway, cast iron gets 30, aluminum gets 25. Don't worry about torque numbers for your headers. Odds are you can't get a torque wrench in there anyway.
You need to get a feel for what 25 -30 lbs is like. Use 3/8" drive assures you will not be breaking bolts. And ARP header bolt kit assures that also.
There are some engines parts that should not be torqued with the wrench.
Timing cover, water pump, oil pan, starter, valve covers, headers and the like.
A box-end wrench will be your best bet on the final torquing of those bolts. Start in the center of the flange, work outwards.
Retighten all bolts after a couple heat cycles, then one more time after that.
Last edited by HeadsU.P.; Jul 1, 2023 at 08:38 AM.
76 L48 Headers
