What's this black box?
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
What's this black box?
I don't have this on my earlier TPIs. What's that black box behind the runners on my '92?
Last edited by chazman; 05-29-2015 at 12:32 AM.
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