B&M Nitrous Holeshot 3500 Torque Converter, 1965-91 GM TH400, TH425 - 20484 flowmaster Machined 3/8” header flange for

Machined 3/8” header flange for a leak-free seal and maximum strength

Application Corvette 77-79

Part Number: 817633

Up to 40 amp draw capacity

1997 - 2015 Chevrolet Tahoe

B&M Nitrous Holeshot 3500 Torque Converter, 1965-91 GM TH400, TH425 - 20484 flowmaster Machined 3/8” header flange forOverview: B&M Nitrous HoleShot 3500 stall for GM 1965 91 TH400, TH425, TH375 and 1968 81 TH350, TH375B (not TH350C.) The Nitrous Holeshot 3500 stall converter are an excellent choice for vehicles with many engine modifications, particularly big cams that tend to reduce low end power and torque. The higher stall speed of this converter will launch the car in a higher rpm range where more torque is readily available, resulting in quicker acceleration.