CYLINDER HEADS
LS Series AFR LSX Mongoose Street High-Flow Aluminum Cylinder Heads AFR LSX Mongoose street high-flow aluminum cylinder heads are specifically designed for 3.900" bore engines and are emissions legal. E/O # D250-4. The LSX Mongoose High Flowing Strip cylinder heads are specifically designed for 4.000" or larger bore engines. Both styles feature CNC-ported intake and exhaust ports. All heads are sold as pairs, completely assembled (unless specified as bare) with stain- less valves, valve springs, retainers, locks, and seals.
Intake Runner
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve
Part No.
Description
Cathedral Ports AFR1510
Mongoose Street Heads Assembled
210cc 215cc 230cc 230cc
66cc 65cc 72cc 65cc
Angled 15° Angled 15° Angled 15° Angled 15°
2.020" 2.020" 2.080" 2.080"
1.600" 1.600" 1.600" 1.600"
AFR1530 AFR1630 AFR1660
Mongoose Big Bore (4" & Larger) Assembled
Mongoose Strip Heads Assembled Mongoose Strip Heads Assembled
LS3 Rectangle Ports AFR1840 LS3 Mongoose CNC-Ported (4" & Larger Bore) Assembled, 6-Bolt AFR1845 LS3 Mongoose CNC-Ported (4" & Larger Bore) Assembled, 4-Bolt
260cc 260cc
69cc 69cc
Angled 15° Angled 15°
2.165" 2.165"
1.600" 1.600"
Brodix LS Heads Brodix BR 7 is the most powerful head right-out-of-the-box in its class. The BR 7 head comes standard with 71cc combustion chambers, bowls blended, and intake ports matched. The STS BR 7 is 100% CNC-ported version that flows over 375 CFM. Both heads accept all standard LS components, come with rectangle intake ports and 6-bolt head pattern. Sold individually.
Intake Runner
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve
Part No.
Description
LS7 Rectangle Port LSX 6 Bolt BRO1170000
BR 7, 262 LS-Series, Bare
262cc 71cc Angled 12° 262cc 71cc Angled 12°
2.204" 2.204"
1.614" 1.614"
BR 7, 262 LS Series, Assembled, 1.350" Spring, 180 lbs. Seat Pressure
BRO1171000
Chevrolet Performance LS Aluminum Heads LT1 Chevrolet Performance LS3 CNC-Ported cylinder head flows more than 350 CFM at .600" intake lift bench flowing 10 percent more than the stock casting. Features include high-efficiency 68cc combustion chambers, CNC'd rectangular port 276cc intake runners, CNC D-port 92cc exhaust ports, 2.165" stainless hol- low stem intake valves, 1.59" stainless solid exhaust valves, beehive springs, valve locks, spring retainers and valve stem seals. Fit any LS engine with cylinder bores of 4.00" or larger. Sold individually.
Intake Runner
Comb. Chamber
Valve Angle
Intake Valve
Exhaust Valve
Part No.
Description
LS3 Rectangle Port GMP88958758
GM LS3, Assembled, CNC-Ported, .550" Max Lift, 4.00" and Larger Bore
276cc
92cc
2.165"
1.590"
1.600"
Dart LS PRO1 280 (LS3 Compatible) Recommended for engines with 4.000" bore and larger. Maximum competition, com/ modified drag racing, circle track, and HD applications. Dart's new LS based PRO1 LS 15 280 aluminum square port has better air flow, efficient combustion chambers and user-friendly features than production LS castings. The 280cc cylinder head retains stock valve angles, stock valve locations, and stock accessory mounting holes. Sold each.
Intake Runner
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve
Part No.
Description
LS3 Rectangle Port DRT11030153
PRO1 280cc
280cc
68cc
Stock
15°
2.165"
1.600"
159 2021-22 ENGINE BUILDER CATALOG
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