Washers between rear vbrace and body?

[eacmen]

Does everyone have thick washers between the rear v brace and the body? I am not seeing these referenced in the OE parts diagram. Are these added to fix the offset of the CMP subframe bushings?

[BBRTuning]

Funny, I had to do this a couple years back and it never occurred to me it was/could have been due to the CMP subframe raising bushings. That combined with dual SS 2.5" doesn't leave much clearance.

[mrgizmo04]

The cross member that we were talking about in the front diff mount thread (that now makes interference so we cant get the socket in square) stays put. It is not higher or lower, because the 4x 13mm that grab it to the body around the driveshaft/diff input are same height. On CMP bushings, the length of the bushing below where it grabs the subframe are extended (since the subframe sits higher) so that the net height of the bushing is the same as other brand bushings, such that the cross member front subframe mounting surfaces mate up as before. Therefore this "preserves" the geometry where the middle of the vbrace attaches to the cross member. I've never seen or used washers there.

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[eacmen]

The cross member that we were talking about in the front diff mount thread (that now makes interference so we cant get the socket in square) stays put. It is not higher or lower, because the 4x 13mm that grab it to the body around the driveshaft/diff input are same height. On CMP bushings, the length of the bushing below where it grabs the subframe are extended (since the subframe sits higher) so that the net height of the bushing is the same as other brand bushings, such that the cross member front subframe mounting surfaces mate up as before. Therefore this "preserves" the geometry where the middle of the vbrace attaches to the cross member. I've never seen or used washers there.

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That’s also what I was thinking. Not sure why previous owner put these washers between the brace and the body then. Maybe clearance for the 3.5” BW exhaust?

[mrgizmo04]

That’s also what I was thinking. Not sure why previous owner put these washers between the brace and the body then. Maybe clearance for the 3.5” BW exhaust?

Just to make sure we are talking about the same washers, these are on the exterior of the vbrace to the body? Not the middle of the vbrace to the cross member?

Because when you do underbody plates for subframe mount reinforcements, there are "double washers" that are placed under the 2 spots of the cross member where the 4x 13mm attach, to account for the thickness of the welded/epoxies plates. Since the welded plates move down the 2 outer attachment points of the cross member, the 4x 13mm mid attachment points of the cross member need to be spaced. Cross members do bend if not appropriately spaced between the attachment points. (Example of these double washers in screenshot below).

Possibly some spacers/washers are used to fit bigger exhaust. I, for example, have used multiple washers on the support that holds the front of section 2 (ss oversized), because otherwise it rattles, especially when it gets hot.

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[eacmen]

Just to make sure we are talking about the same washers, these are on the exterior of the vbrace to the body? Not the middle of the vbrace to the cross member?

Because when you do underbody plates for subframe mount reinforcements, there are "double washers" that are placed under the 2 spots of the cross member where the 4x 13mm attach, to account for the thickness of the welded/epoxies plates. Since the welded plates move down the 2 outer attachment points of the cross member, the 4x 13mm mid attachment points of the cross member need to be spaced. Cross members do bend if not appropriately spaced between the attachment points. (Example of these double washers in screenshot below).

Possibly some spacers/washers are used to fit bigger exhaust. I, for example, have used multiple washers on the support that holds the front of section 2 (ss oversized), because otherwise it rattles, especially when it gets hot.

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I should have taken photos. But there were 3 thick (1/8”) washers that were between the rear V brace and the body (2) and crossmember (1).

Part circled.

[mrgizmo04]

I should have taken photos. But there were 3 thick (1/8”) washers that were between the rear V brace and the body (2) and crossmember (1).

Part circled.

Yeah most likely to make some room for bigger piping, that's around where the piping stays bending from centerline to the outer edge. Also especially if custom additional resonator was added around there.

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