Allstar Performance 4" Steel Jack Bolt - Coarse Thread (1"-8) 20-OTL-NB-2XL Inserts are used in place

Inserts are used in place of restricting inserts allowing full throttle operation without restriction

Riveted reinforcement plate adds strength and high-pitch 32° blades increase airflow

7/8-20 in Dual Outlets

Reinforced M6 threaded HANS/HNR inserts are mated to the shell along with an expanded polystyrene (EPS) liner

Allstar Performance 4" Steel Jack Bolt - Coarse Thread (1"-8) 20-OTL-NB-2XL Inserts are used in placeBolts have a 7 16" 20 internal thread on one end for use with bolt on and swiveler spring cups. Coarse thread bolts have 1" 8 outer threads while fine thread bolts are 1 1 8" 12. 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