Notes: Street legal performer; chamber size 60cc; single; 2.02" intake valves; requires pushrods PN# 9632; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust; 50-state street emissions legal;

Notes: 24 stud; recommend Felpro gasket PN[1055] left and PN[1056] right;

Notes: Performer RPM; chamber size 87cc; single; polished; street legal;

Notes: Performer; chamber size 60cc; single; 1.90" intake valves; machined for FelPro Loc Wire(TM) gasket; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust;

Notes: E-Tec 170. Chamber size 64cc. Single. For engines with Vortec-style intake manifolds. Polished. Small block.

Notes: Performer; chamber size 54cc; single; w/o exhaust crossover port; 50-state street emissions legal;

Notes: Performer RPM; chamber size 72cc; single; NHRA legal; not for sale or use on pollution controlled motor vehicles; recommend rocker shaft stud kit PN[6009] for better rocker shaft retention; rec. Edelbrock gskt PN[7302] head; FelPro PN[1213] intake; PN[1413] exhaust;

Notes: Performer; chamber size 110cc; single; 454-O; street legal; Big block.

Notes: High lift/large chamber heads; pair;

Notes: Street legal performer; chamber size 60cc; single; 2.02" intake valves; requires pushrods PN# 9632; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gskt PN[7313] head; PN[1250] intake; PN[1415] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 60cc; single; 1.90" intake valves; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust;

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; rec. FelPro gasket PN[1003] head; PN[GM10159409] intake; PN[1404] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 70cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; must use choke kit PN[1932] if using hot air choke carb and Performer intke; do not use on eng. w/less than 4in. bore; exc w/cam less than .450in. valve; recommend Edelbrock gasket PN[7310] head; PN[7201] intake; PN[7204] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 60cc; single; 2.02" intake valves; machined for FelPro Loc Wire(TM) gasket; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust;

Notes: Performer; chamber size 110cc; complete; single; 454-O; street legal; polished; Big block.

Notes: Performer RPM; chamber size 87cc; single; street legal; recommend Edelbrock gasket PN[7381] head; PN[7280] intake; PN[7281] exhaust;

Notes: 24 stud; recommend gasket; victor PN[3036] or Fel-pro PN[7548];

Notes: Street legal Performer; chamber size 60cc; single; 1.90" intake valves; polished;

Notes: E-Street. 84cc. Combustion chamber. Pair.

Notes: Performer; chamber size 64cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; must use choke kit PN[1932] if using hot air choke carb and Performer intke; do not use on eng. w/less than 4in. bore; exc w/cam less than .450in. valve; recommend Edelbrock gasket PN[7310] head; PN[7201] intake; PN[7204] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 70cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; must use choke kit PN[1932] if using hot air choke carb and Performer intke; do not use on eng. w/less than 4in. bore; exc w/cam less than .450in. valve; recommend FelPro gasket; PN[1014] head; PN[1205] intake; PN[1404] exhaust; 50-state street emissions legal;

Notes: Performer high-compression 454-O; chamber size 100cc; single; street legal; recommend Edelbrock gasket PN[7302] head; PN[7203] intake; PN[7205] exhaust; 50-state street emissions legal; Big block.

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; polished;

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; rec.Edelbrock gasket PN[7310] head; PN[GM10159409] intake; PN[7204] exhaust; 50-state street emissions legal;

Notes: Street legal performer; chamber size 60cc; single; 1.90" intake valves; requires pushrods PN# 9632; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gskt PN[7313] head; PN[1250] intake; PN[1415] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 60cc; single; 2.02" intake valves; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gskt PN[7313] head; PN[1250] intake; PN[1415] exhaust;

Notes: 24 stud; w/block letter logo; pair;

Notes: Performer; chamber size 110cc; single; 454-O; street legal; recommend Edelbrock gasket PN[7302] head; PN[7203] intake; PN[7205] exhaust; Big block.

Notes: Street legal Performer; chamber size 60cc; single; 2.02" intake valves; polished;

Notes: Street legal performer; chamber size 60cc; single; 2.02" intake valves; machined; requires pushrods PN# 9632; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust; 50-state street emissions legal;

Notes: Performer high-compression 454-O; chamber size 100cc; single; street legal; recommend Edelbrock gasket PN[7302] head; PN[7203] intake; PN[7205] exhaust; 50-state street emissions legal; Big block.

Notes: Performer; chamber size 60cc; single; 1.90" intake valves; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gskt PN[7313] head; PN[1250] intake; PN[1415] exhaust;

Notes: Street legal performer; chamber size 60cc; single; 1.90" intake valves; requires pushrods PN# 9632; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gskt PN[7313] head; PN[1250] intake; PN[1415] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 54cc; single; w/o exhaust crossover port;

Notes: Performer RPM; chamber size 72cc; single; NHRA legal; not for sale or use on pollution controlled motor vehicles; recommend rocker shaft stud kit PN[6009] for better rocker shaft retention; rec. Edelbrock gskt PN[7302] head; FelPro PN[1213] intake; PN[1413] exhaust;

Notes: Performer; chamber size 60cc; single; 2.02" intake valves; street legal; requires head bolt bushings PN[9680] and OE bolts or head bolt kit PN[8552]; will not accept rail rockers; recommend Edelbrock gasket PN[7313] head; PN[7220] intake; PN[7227] exhaust;

Notes: E-Tec 170. Chamber size 64cc; single; for engines with Vortec-style intake manifolds; 50-state street emissions legal; for use with eTec manifolds; Small block.

Notes: E-Tec 170. Chamber size 64cc; single; for engines with Vortec-style intake manifolds; 50-state street emissions legal; for use with eTec manifolds; Small block.

Notes: Performer RPM; chamber size 87cc; single; street legal; recommend FelPro gasket; PN[1016] head; PN[1233] intake; PN[1436] exhaust; recommend Edelbrock gasket PN[7381] head; PN[7280] intake; PN[7281] exhaust;

Notes: Performer; chamber size 54cc; single; street legal; 50-state street emissions legal;

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; rec.Edelbrock gasket PN[7310] head; PN[GM10159409] intake; PN[7204] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 60cc; single; 1.90" intake valves; polished; recommend Edelbrock gskt PN[7313] head; PN[1250] intake;PN[1415] exhaust;

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; polished;

Notes: Performer centerbolt; chamber size 60cc; single; must use hardened pushrods; street legal; when using stock rockers; must use .100 in. longer than stock pushrods; rec. FelPro gasket PN[1010] head; PN[GM10159409] intake; PN[1404] exhaust; 50-state street emissions legal;

Notes: Performer; chamber size 54cc; single; 50-state street emissions legal;