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Mac mid length or ASM headers will keep the cats closer to the stock location and offer almost as much power as longtubes without the headache of less ground clearance if you lower the car. I put Pacesetter longtubes on my old 96 SS with dual high flow cats but ended up selling the car before going through inspection. That was OBDII anyway and the computer wasn't throwing any codes so it probably would have passed.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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