Allstar Performance Steel Tubing - 1-5/8 in OD - 0.134 in Wall Thickness - 7-1/2 ft Long HARZ201 Big GM inlet thread is

Big GM inlet thread is 7/16"-20

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Allstar Performance Steel Tubing - 1-5/8 in OD - 0.134 in Wall Thickness - 7-1/2 ft Long HARZ201 Big GM inlet thread isSold only in pre cut lengths. Always check wall thickness tolerance before cutting or welding, especially if the car is to be certified. Tubing wall thickness will vary. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over 30 years, customers worldwide have come to rely on the quality, affordable and practical