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not a ton of progress I welded the trans mount to the frame, I may add a support to the underside, because I had to cut down part of the rear gusset to fit the LCA bolt in. I started laying out the new brake lines, and was starting to get super frustrated, it took an embarrassingly long time for me to figure out the issue. The reman front right line is two pieces instead of one, and they sent me two of the caliper side, and not one of the ABS module side... I emailed inline tube, and they sent me the correct part.
this is the flange for the rear pipe, notice the huge gap between the pipe and the flange? filling it with weld was an option, but I had a trick to try first...
I slipped the end of the pipe onto a 2" hitch ball, gave it a few good whacks with a hammer...
TA-DA! no more gap.
I started by extending the front pipe back, then carefully made a rear pipe to meet up with it.
unfortunately, the new rear pipe didn't clear the heat shield that I had neglected to install when I made it....so I cut it apart and started over...
after paying more attention to the spatial constraints imposed by the heat shield, I came up with this:
overall, it's very similar to what I had before, just repositioned, and slightly longer than the previous. ideally, I wanted both head pipes to be the same length, or somewhat close, at this point, the front is a few inches longer, maybe 3-4, but much closer than stock.
by balancing the pipe lengths, the exhaust pulses should merge with each other a little bit better, and minimize "crowding" in the rest of the exhaust past the Y pipe. I don't expect this to make a significant performance improvement, but I suspect it will change the tone of the exhaust some. my current plan is to y them together at the current end of the rear pipe, and tie them into the factory exhaust which should be close by.
this is the flange for the rear pipe, notice the huge gap between the pipe and the flange? filling it with weld was an option, but I had a trick to try first...
I slipped the end of the pipe onto a 2" hitch ball, gave it a few good whacks with a hammer...
TA-DA! no more gap.
I started by extending the front pipe back, then carefully made a rear pipe to meet up with it.
unfortunately, the new rear pipe didn't clear the heat shield that I had neglected to install when I made it....so I cut it apart and started over...
after paying more attention to the spatial constraints imposed by the heat shield, I came up with this:
overall, it's very similar to what I had before, just repositioned, and slightly longer than the previous. ideally, I wanted both head pipes to be the same length, or somewhat close, at this point, the front is a few inches longer, maybe 3-4, but much closer than stock.
by balancing the pipe lengths, the exhaust pulses should merge with each other a little bit better, and minimize "crowding" in the rest of the exhaust past the Y pipe. I don't expect this to make a significant performance improvement, but I suspect it will change the tone of the exhaust some. my current plan is to y them together at the current end of the rear pipe, and tie them into the factory exhaust which should be close by.
Are you looping the rear exhaust for the angle, equal length, or? I don't know what the U turn is stock but I remember reading people getting rid of something on the stock 3900 G6 setups.
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