Professional Products Manifold O-Ring Kit - Cathedral Port - LS1 / LS6 Intakes - GM LS-Series (Set of 8) 1419A67 0 mS Max Continuous Dwell:

0 mS Max Continuous Dwell: 9 mS but don't exceed 40% duty cycle Max Intermittent Dwell: 80% duty cycle

1/4" and 1/2" spacers

9% and produced 17hp and 50lbs

23-ounce tank is 3-1/4" diameter by 7-3/4" tall

TH400 / TH375 / M40 1965-87

Professional Products Manifold O-Ring Kit - Cathedral Port - LS1 / LS6 Intakes - GM LS-Series (Set of 8) 1419A67 0 mS Max Continuous Dwell:Product Description: Intake Manifold Gasket O Ring Cathedral Port Rubber Professional Products LS1 LS6 Intakes GM LS Series Set of 8 The year was 1972, as newly imported automotive brands from Europe and Japan were gaining popularity; the founders of Professional Products entered the racing industry as part of Brock Racing Enterprises. The performance and styling parts company was an off shoot of the Datsun (Nissan) Racing Team. Prior to this, Brock