LBZ Duramax 2006–2007 VIN starts with “2” or “D” Chevy Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD. ???? Speedy Intercooler Piping Kit – For 2006–2010 GM 6.6L LBZ/LMM Duramax Diesel ????. Engineered exclusively for GM heavy-duty trucks with 6.6L Duramax diesel engines, tailored to two specific generations via VIN code.
