Nitrous Distribution Block, 1 In 4 Out - 1/8" NPT Standard Block, Black 1983-pontiac-firebird-esi2278290 The Edelbrock #60575 Performer cylinder

The Edelbrock #60575 Performer cylinder head is 50-state emissions legal for 1965-79 vehicles

and all-season performance

Technical Note: Use with grommet in Grommet Set P/N 141-615

To correct the clearance issue to the pulley

Nitrous Distribution Block, 1 In 4 Out - 1/8" NPT Standard Block, Black 1983-pontiac-firebird-esi2278290 The Edelbrock #60575 Performer cylinderNitrous Distribution Block, 1 In 4 Out 1 8" NPT Standard Block, Black NOS Distribution Blocks are precision machined to help distribute balanced amounts of nitrous and fuel to each intake port. All NOS Distribution Blocks use 1 8" NPT "in" and are available with 1 8" NPT or 1 16" NPT "out." Fittings must be ordered separately.