Page 173 - 2018 Master Catalog

CAMSHAFTS
Add CL-prefix for Cam & Lifter Kits.
DURATION VALVE LIFT
CHEVROLET 173-207 C.I. (2.8L-3.4L) 60° 6 CYL. 1979-1994 RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
HIGH ENERGY™ Hydraulic Flat Tappet Camshafts
16-232-4 Good power for 2 or 4 wheel drive S-10, S-15 or Blazer. Works well in mild towing apps. Smooth idle. 800 to 4800 252H 252 252 206 206 .425 .425 110°
16-233-4 Good performance cam for 2.8L engine. Lope at idle w/ extremely good top end power. 1000 to 5000 260H 260 260 212 212 .440 .440 110°

DURATION VALVE LIFT
CHEVROLET 262-400 C.I. 8 CYL. 1958-1998 RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
HIGH ENERGY™ Hydraulic Flat Tappet Camshafts
12-210-2 Good street performance with stock converter, choppy idle. 1500 to 5500 268H 268 268 218 218 .454 .454 110°
MAGNUM Hydraulic Flat Tappet Camshafts
12-211-2 High performance. Biggest cam w/ stock converter but better w/ 2000+ stall. 1800 to 5800 270H 270 270 224 224 .470 .470 110°
Use lower gears. Mild rough idle.
12-212-2 Great for street machines. Needs 2500+ stall, headers and gears. Rough idle. 2000 to 6000 280H 280 280 230 230 .480 .480 110°
12-213-3 Street/strip special, 3000 stall, headers, gears, 9.5:1 compression. Very rough idle. 2500 to 6500 292H 292 292 244 244 .501 .501 110°
12-214-4 Pro Street/bracket, limited street driving. Intake, gears, 3500+ stall. 10.5:1 comp. Racy idle. 3000 to 7000 305H 305 305 253 253 .525 .525 110°
XTREME ENERGY™ Hydraulic Flat Tappet Camshafts
12-234-2 Strong torque thru low end and mid-range, good idle. 1000 to 5200 XE256H 256 268 212 218 .447 .454 110°
12-238-2 Excellent response, good mid-range, noticeable idle. 1300 to 5600 XE262H 262 270 218 224 .462 .469 110°
12-242-2 Great for street machines, largest cam for stock converter, better with 2000+ stall. 1600 to 5800 XE268H 268 280 224 230 .477 .480 110°
12-246-3 Very strong mid-range torque and throttle response, 2200+ stall. 1800 to 6000 XE274H 274 286 230 236 .490 .490 110°
12-250-3 Street/strip, 2800+ stall, likes headers and gears, rough idle. 2300 to 6500 XE284H 284 296 240 246 .507 .510 110°
THUMPR™ Hydraulic Flat Tappet Camshafts
12-600-4 Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears. 2000 to 5800 279TH7 279 297 227 241 .479 .465 107°
Choppy/thumping idle.
12-601-4 Mutha’ Thumpr™ - High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears 2200 to 6100 287TH7 287 305 235 249 .489 .476 107°
and headers, rough idle.
12-602-4 Big Mutha’ Thumpr™ - Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears, and headers, 2500 to 6400 295TH7 295 313 243 257 .500 .486 107°
very rough idle.

DURATION VALVE LIFT
CHEVROLET 396-454 C.I. 8 CYL. 1967-1996 RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
MAGNUM Hydraulic Flat Tappet Camshafts
11-207-3 Good for daily driven street machine, works with stock converter, likes headers, 396ci needs 3.55-3.73 1500 to 5800 270H 270 270 224 224 .510 .510 110°
gear and 1800+ stall. Slight rough idle.
Street/strip applications. 10:1+ compression, 3000+ stall or 4 speed. 4.10 or lower gears and
11-213-3 2500 to 6500 292H 292 292 244 244 .550 .550 110°
aftermarket intake. Very rough idle.
11-214-4 Limited street use or bracket racing. 10.5:1+ compression, 3500+ stall or 4 speed. 4.10 or lower 3000 to 6800 305H 305 305 253 253 .575 .575 110°
gears. Radical idle.
XTREME ENERGY™ Hydraulic Flat Tappet Camshafts
11-238-3 Strong torque. Excellent response, heavy towing in 454 with 4.10 gear. 1300 to 5600 XE262H 262 270 218 224 .504 .510 110°
11-242-3 Good for street machines, slightly rough idle, stock converter will work but best with 1800+ stall. 1600 to 5800 XE268H 268 280 224 230 .515 .520 110°
11-250-3 Street/strip, 2800+ stall, rough idle, 9.5:1+ compression. 2300 to 6500 XE284H 284 296 240 246 .574 .578 110°
THUMPR™ Hydraulic Flat Tappet Camshafts
Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears.
11-600-4 1800 to 5600 279TH7 279 296 227 241 .498 .483 107°
Choppy/thumping idle.
11-601-4 Mutha’ Thumpr™ - High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears 2000 to 5900 287TH7 287 304 235 249 .510 .495 107°
and headers, rough idle.
11-602-4 Big Mutha’ Thumpr™ - Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears, and headers, 2300 to 6200 295TH7 295 312 243 257 .522 .507 107°
very rough idle.

DURATION VALVE LIFT
GM LT1 & LT4 350 C.I. 8 CYL. 1995-1997 RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
XTREME ENERGY™ Hydraulic Flat Tappet Camshafts
07-304-8 Good in factory LT1, noticeable increase over stock cam. 1000 to 5000 266HR-14 266 276 210 220 .500 .510 114°
07-503-8 Best cam for modified LT1, better exhaust & 2000+ converter. Requires custom tuning. 1800 to 5800 276HR-12 276 281 224 230 .503 .510 112°

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