Jeff - ALDA doesn't hold vacuum, I'll try pressure (which I understand it was designed for). With how slow the car was before removing the ALDA, I'm sure there's something wrong with it. Nice setup, BTW!

Update: just 'unplugged' the cat, and immediately took the 0-60 down from 17 to 13 seconds. (before ALDA removal and cat mod, it took 21 seconds).

Anyone know where to get the o-ring seals for the ALDA and that little one on the shaft that the ALDA sits on top of?

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1986 300 SDL, gray on black, #14 head, 180K miles
1982 300 CD, silver on palomino, 290K+ miles [sold]
1980 300 SD, white on palomino, 500K+ miles when retired [uncle's car - inspiration for the above]