There's a number of people using them on ls1tech.com. They also have a line of headers out that are made by hedman. I've never used them personally but I'm not a fan of their design. It just looks weak using those control arm bushing type things instead of a traditional motor mount. Maybe it is perfectly fine but it just looks weird to me.
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Trey
Current ride: 2001 BMW 540iT soon to be manual swapped.
Former rides: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
00 BMW 540i/6: Suspension, wheels, and ACS bits.
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