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I have an aftermarket dual exhaust in the stock configuration on my '72 Supreme and came across these on ebay. Will they work, and although I've checked the ASM, the drawings aren't very clear on how to install them. Does anyone have a pic or an idea on how they install?
They will work. 2 self tapping bolts attach the rubber to the frame, and the flat goes on a traditional u-bolt clamp, right behind the mufflers and ahead of the axle....
They will work. 2 self tapping bolts attach the rubber to the frame, and the flat goes on a traditional u-bolt clamp, right behind the mufflers and ahead of the axle....
Not sure what you mean by "the flat". If I'm looking at the pic correctly, one rubber is horizontal and one is vertical. Are you talking about the horizontal rubber or the middle of the hanger where the two holes are?
Both of the rubber straps get bent 90 deg at installation to provide some "give" in the hanger. I've had to slot the holes slightly to fit the U-bolt for the muffler clamp when using 2.5" tail pipes,since the stock bracket is designed for 2" tail pipes.
Both of the rubber straps get bent 90 deg at installation to provide some "give" in the hanger. I've had to slot the holes slightly to fit the U-bolt for the muffler clamp when using 2.5" tail pipes,since the stock bracket is designed for 2" tail pipes.
So if I'm looking at the diagram correctly, the horizontal strap gets bent up to a vertical position, and the vertical strap gets a 90 deg horizontal bend at the top,, correct? Also, how the bolts install? Looks to me like one goes down through the floor pan and the other goes through from underneath. If that's the case, then the one that goes through underneath would also have to have the nut installed from the floor pan side, right?
Not the floorpan. There's a frame crossbrace that supports the rear upper control arms and shocks. Muffler hanger attaches to that.
And to add to this, the bolts are self-tapping and thread into that thick crossmember, so no nuts required. Also note the large washer under the bolt head to prevent pulling through the rubber strap. And FYI, on the assembly line the exhaust was hung on the frame before the body was dropped on, so obviously the hangers can't bolt to the floorpan. (and yes, I realize the bottom photo is a 67, not a 68-72 frame)
And to add to this, the bolts are self-tapping and thread into that thick crossmember, so no nuts required. Also note the large washer under the bolt head to prevent pulling through the rubber strap. And FYI, on the assembly line the exhaust was hung on the frame before the body was dropped on, so obviously the hangers can't bolt to the floorpan. (and yes, I realize the bottom photo is a 67, not a 68-72 frame)
Makes sense to me now..thanks Joe. When you bend the straps at the 90 deg angles, does it put anything in a bind? Seems to me that the straps would want to "bend back" to their original state, and thus "pulling" on the exhaust, creating a bind.
Makes sense to me now..thanks Joe. When you bend the straps at the 90 deg angles, does it put anything in a bind? Seems to me that the straps would want to "bend back" to their original state, and thus "pulling" on the exhaust, creating a bind.
That's why the straps are bent in opposite directions, so the forces counteract each other. Having that bend allows some give in the vertical direction. If the rubber strap was straight up and down, there would be no vertical compliance.
