Chevy Factory Cam Specs

Chevrolet Factory Cam Specs by part number

Part # Lifter type–duration at .050 In/ex–Lift in/ex–centerline–description

Small Blocks

3849346 Mechanical - 254/254 – .484/.484 – 114 – 327 365HP& Z-28 302

3863151 Hyd. – 221/221-.447/.447-114 - 327-350HP, L79

3896929 Hyd. – 195/202 – .390/.410 – 112 – 327 300 HP

3896962 Hyd. – 222/222 – .450/.460 – 114 – 350 L-46, L-82

3927140 Mechanical – 257/269 – .493/.512 – 112 – Off Road

3965724 Mechanical – 262/273 – .488/.509 – 112 – 2nd design road race, short track

3972178 ?

3972182 Mechanical – 242/254 – .459/.485 – 116 – 70 LT1 360 & 370HP, 71 LT 330 HP

10134334 Hyd. Roller – 235/235 – .480/.480 – 114 – 350ZZZ and ZZ2 Crate Motor

10185071 Hyd. Roller – 208/221 – .474/.474 – 112 – 350 345, ZZ3&4 Crate Motor

10224241 Hyd. Roller – - 92-94 GenII, LT1, 350

10243779 Hyd. Roller – - 94-96 Gen II, L99 265 V-8

12353914 Hyd. – 180/194 – .378/.401 – – GM Crane Lo speed Hi torque

12353915 Hyd. – 194/204 – .401/.423 – 104 – GM Crane street

12353916 Hyd. – 204/214 – .423/.446 – 110 – GM Crane 305-350 street legal 50 states

12353917 Hyd. – 204/214 – .420/.441 – 112 – GM Crane nan-emissions vehicles & off road

12353918 Hyd. – 214/224 – .442/.465 – 112 – GM Crane marine & off road

12353923 Hyd. – 224/234 – .465/.448 – 114 – GM Crane off road

12364050 ?

12364051 ?

12364052 ?

12364053 ?

12364054 ?

12370845 Hyd. Roller – 214/224 – .488/.509 – 112 – Off Road, lobe for mech fuel pump

12370846 Hyd. Roller – 222/230 – .509/.528 – 112 – Off Road, lobe for mech fuel pump

12370847 Hyd. Roller – 232/242 – .539/.558 – 112 – Off Road, lobe for mech fuel pump

12551142 Hyd. Roller – 203/210 – .476/.480 – 115.5 – 96 350 LT4 w1.6 roller rockers

12551705 Hyd. Roller – 201/208 – .447/.459 – 112 – 95-96 Gen II, LT1, w center dowel pin

14088843 Hyd. – 202/206 – .403/.415 – 115 – 305 HO, 83-86

14093643 Hyd. Roller – 202/206 – .403/.415 – 115 – 87 350 Corvette, IROC Camaro

24502476 Hyd. – 121/220 – .435/.460 – 112.5 – 350 300 crate motor

24502586 Hyd. Roller – 218/228 – .525/.525 – – 96 LT4 H.O.T. crate motor, use with 1.6 roller rockers

NA Hyd. Roller – 202/210 – .472/.478 – 111 – 97 Gen III LS1 Corvette 350 uses 1.7 roller rockers