Page 161 - 2021-22_EngineCatalogAP

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.
Part No.
Cathedral Ports
AFR1510 AFR1530 AFR1630 AFR1660
LS3 Rectangle Ports
Description
Mongoose Street Heads Assembled Mongoose Big Bore (4" & Larger) Assembled Mongoose Strip Heads Assembled Mongoose Strip Heads Assembled
Intake Comb. Runner Chamber
210cc 66cc 215cc 65cc 230cc 72cc 230cc 65cc
260cc 69cc 260cc 69cc
Plug Valve Angle Angle
Angled 15° Angled 15° Angled 15° Angled 15°
Angled 15° Angled 15°
Intake Valve
2.020" 2.020" 2.080" 2.080"
2.165" 2.165"
Intake Valve
2.204" 2.204"
Exhaust Valve
1.600" 1.600" 1.600" 1.600"
1.600" 1.600"
Exhaust Valve
1.614" 1.614"
AFR1840 LS3 Mongoose CNC-Ported (4" & Larger Bore) Assembled, 6-Bolt AFR1845 LS3 Mongoose CNC-Ported (4" & Larger Bore) Assembled, 4-Bolt
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.
Part No. Description
LS7 Rectangle Port LSX 6 Bolt
BRO1170000 BR 7, 262 LS-Series, Bare BRO1171000 BR 7, 262 LS Series, Assembled,
1.350" Spring, 180 lbs. Seat Pressure
Chevrolet Performance LS Aluminum Heads
Intake Comb. Runner Chamber
262cc 71cc 262cc 71cc
Plug Valve Angle Angle
Angled 12° Angled 12°
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.
Part No. Description
LS3 Rectangle Port
GMP88958758 GM LS3, Assembled, CNC-Ported, .550" Max Lift, 4.00" and Larger Bore
Dart LS PRO1 280 (LS3 Compatible)
Intake Runner
276cc
Comb. Chamber
92cc
Valve Angle
2.165"
Intake Valve
1.590"
Exhaust Valve
1.600"
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.
Part No.
LS3 Rectangle Port
Description
Intake Comb. Runner Chamber
Plug Angle
Stock
Valve Intake Angle Valve
15° 2.165"
Exhaust Valve
1.600"
DRT11030153
PRO1 280cc
280cc 68cc
CYLINDER HEADS
LS / LT (GEN-5) SERIES
2021-22 ENGINE BUILDER CATALOG
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