Have you verified they won't work and cover the port? I ask because LT1/4 cars are D-port exhaust from the factory and yet 1-3/4" round primary headers cover the port just fine. This used to come up all the time with people new to LT1/4 cars and D-port exhaust. If you've checked and they indeed won't work, I don't have any suggestion, sorry. Good luck!
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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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