Page 174 - 2018 Master Catalog

DURATION VALVE LIFT
GM LS GEN III/IV THREE-BOLT 8 CYL. 1997-2015 RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
XFI™ RPM Hydraulic Roller Camshafts
54-408-11 Very strong torque, good mileage. Noticeable increase over stock cam. 800 to 5800 XR259HR 259 265 206 212 .515 .522 112°
54-412-11 Good torque and very strong mid-range power. Good performance cam. 1200 to 6000 XR265HR 265 271 212 218 .522 .529 114°
54-414-11 Great mid-range with superior top end power. Needs programmer. 1300 to 6300 XR269HR 269 273 216 220 .525 .532 114°
54-418-11 Street/strip camshaft designed for use with FAST™ LSX™ intake. Requires programmer. 1600 to 6600 XR277HR 277 281 224 228 .534 .537 112°
XFI™ RPM HI-LIFT Hydraulic Roller Camshafts
54-426-11 Great street/strip camshaft for mid-range and high RPM power. Must have programmer. 1800 to 6800 XR275HR 275 277 222 224 .566 .568 112°
54-428-11 High RPM street/strip camshaft for use with FAST™ LSX™ intake. Requires programmer. 2200 to 7200 XR281HR 281 283 228 230 .571 .573 112°
XFI™ XE-R Hydraulic Roller Camshafts
54-444-11 High RPM street/strip with XE-R lobe designs. Requires custom tuning 2000 to 7000 XER273HR 273 279 224 230 .581 .588 114°
54-446-11 Xtreme Energy XE-R design for standard displacement LS6 and LS1. 2400 to 7200 XER281HR 281 283 232 234 .595 .598 112°
54-448-11 Xtreme Energy XE-R design for large cubic inch LS6 and LS1. 2800 to 7200 XER287HR 287 289 238 240 .605 .609 112°
XFI™ XTREME TRUCK Hydraulic Roller Camshafts
54-450-11 4.8L/5.3L Chevy/GMC truck. Significant gains in mid and upper RPM range. Best w/ programmer. 800 to 5000 G3 XFI 260 HR15 260 266 206 212 .513 .520 115°
54-452-11 6.0L Chevy/GMC truck. Significant gains in mid and upper RPM range. Best w/ programmer. 800 to 5200 G3 XFI 266 HR15 266 270 212 216 .520 .524 115°
LSR™ RECTANGULAR PORT Hydraulic Roller Camshafts
54-453-11 Excellent torque with a very broad power band. Great for street performance & drivability. 1500 to 6700 269LRR HR13 269 285 219 235 .607 .621 113°
54-454-11 Good street/strip camshaft with very wide range. 1900 to 7000 277LRR HR13 277 293 227 243 .614 .624 113°
LSR™ CATHEDRAL PORT Hydraulic Roller Camshafts
54-456-11 Great torque w/ a very broad power band. Great for street performance & drivability. 1500 to 6700 269Lr HR12 269 277 219 227 .607 .614 112°
54-457-11 Steady power throughout broad range. Needs aftermarket airflow improvements on inlet and exhaust. 1700 to 6800 273Lr HR12 273 281 223 231 .610 .617 112°
54-459-11 Very wide power range and excellent mid-range torque for LS engines with cathedral port cyl. heads. 2000 to 7000 281LR HR13 281 289 231 239 .617 .624 113°
54-460-11 Very strong from mid-range to high end torque and horsepower for LS engines w/ cathedral port heads. 2200 to 7200 285LR HR13 285 293 235 243 .621 .624 113°
THUMPR™ Hydraulic Roller Camshafts
54-600-11 Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears. 2000 to 6400 275THR9 275 295 219 233 .553 .536 109°
Choppy/thumping idle.
Mutha’ Thumpr™ - High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears
54-601-11 2300 to 6600 283THR9 283 303 227 241 .563 .546 109°
and headers, rough idle.
54-602-11 Big Mutha’ Thumpr™ - Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears, and headers, 2600 to 6800 291THR9 291 311 235 249 .573 .558 109°
very rough idle.
DURATION VALVE LIFT
FORD 221-302 C.I. 8 CYL. 1963-1995 (INCLUDES 221/260/289/302) RPM OPERATING ADVERTISED @ .050” W/1.7 ROCKER LOBE
PART NO. DESCRIPTION RANGE CAM GRIND # IN. EX. IN. EX. IN. EX. SEP. ANGLE
THUMPR™ Hydraulic Flat Tappet Camshafts
Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears.
31-601-5 2000 to 5800 279TH7 279 296 227 241 .491 .476 107°
Choppy/thumping idle.
DURATION VALVE LIFT
FORD 351W 8 CYL. 1969-1996 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
35-250-4 Street/strip with 2800+ stall, headers, gears, rough idle. 2300 to 6500 XE284H 284 296 240 246 .541 .544 110°
THUMPR™ Hydraulic Flat Tappet Camshafts
35-600-4 Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears. 2000 to 5800 279TH7 279 297 227 241 .490 .475 107°
Choppy/thumping idle.
DURATION VALVE LIFT
FORD 352-428 C.I. 8 CYL. 1963-1977 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
33-238-4 Strong torque, excellent throttle response. Will work w/ stock converter but prefers 1800+ stall. 1300 to 5600 XE262H 262 270 218 224 .513 .520 110°

DURATION VALVE LIFT
FORD 429, 460 C.I. 8 CYL. 1968-1995 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
34-331-4 Great cam for street machines. Needs 2500+ converter, headers and 9:1 compression. 2000 to 6000 280H 280 280 230 230 .530 .530 110°
THUMPR™ Hydraulic Flat Tappet Camshafts
34-600-5 Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears. 2000 to 5800 279TH7 278 296 226 241 .506 .493 107°
Choppy/thumping idle.
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