CYLINDER HEADS
Brodix SR20 Series Aluminum Heads The Brodix SR20 cylinder head is the cutting edge of the conventional big block Chevy style heads. Inspired by TPSA technology, the SR20 boasts a .500" raised CNC-ported 440cc intake port flowing 507 CFM and exhaust with 335 CFM, right out of the box. The newly designed 95cc combustion chamber houses a 2.400" intake and 1.800" exhaust (11/32" stem diameter) valves. The intake valve angle of 20° requires custom pistons, Brodix valve covers, head studs, shaft rockers, and a Brodix intake manifold specifically designed for the SR20 heads. Sold individually.
Intake Runner 440cc
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve 1.800"
Part No.
Description
Assembled, 1.645" Springs, 315 lbs. Seat Pressure/Titanium Retainers
BRO2208100
95cc
Rect.
20°/13° 2.400"
DRT15100010
Dart Iron Eagle Heads Economical cast iron, rectangular-port head is available with high-velocity 308cc or big displacement, high-revving 345cc intake runners, raised exhaust ports, heart-shaped combustion chambers, and hardened exhaust seats. Sold individually.
Intake Runner 308cc 308cc 308cc 345cc 345cc 330cc
Comb. Chamber
Intake Valve
Exhaust Valve
Part No.
Description Bare Head
Port Type Valve Angle
DRT15100010 DRT15100111 DRT15100112 DRT15200030 DRT15200132 DRT15370030
119cc 119cc 119cc 119cc 119cc 126cc
Rect. Rect. Rect. Rect. Rect. Rect.
24°/15° 2.250" 1.880" 24°/15° 2.250" 1.880" 24°/15° 2.250" 1.880" 24°/15° 2.300" 1.880" 24°/15° 2.300" 1.880" 24°/15° 2.300" 1.880"
Assembled, 1.550" Single Spring, 145 lbs. Seat Pressure Assembled, 1.550" Double Spring, 215 lbs. Seat Pressure
Bare Head
Assembled, 1.550" Double Spring, 215 lbs. Seat Pressure
Dart Iron Eagle Pro CNC, Bare Head
DRT19100112
Dart Pro 1 Aluminum Heads Pro 1 head has rolled over valve angles, raised exhaust ports and fast-burn combustion chambers. Available bare or fully assembled in three different intake runner sizes. Sold individually.
Intake Runner 310cc
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve 1.880"
Part No.
Description Bare Head
DRT19100010
119cc
Rect.
24°/15°
2.250"
Assembled, 1.550" Double Spring 275 lbs. Seat Pressure
DRT19100112
310cc
119cc
Rect.
24°/15°
2.250"
1.880"
DRT19200010
Bare Head
325cc
119cc
Rect.
24°/15°
2.250"
1.880"
Assembled, 1.625" Double Spring 275 lbs. Seat Pressure
DRT19200116
325cc
119cc
Rect.
24°/15°
2.250"
1.880"
DRT19300030
Bare Head
345cc
119cc
Rect.
24°/15°
2.300"
1.880"
Assembled, 1.625" Double Spring 275 lbs. Seat Pressure
DRT19300136
345cc
119cc
Rect.
24°/15°
2.300"
1.880"
DRT19474030
Dart Pro 1 CNC Ported Aluminum Heads The first fully CNC-machined production head, available with 335cc or 355cc intake runners, rolled valve angles, raised exhaust ports, and fast-burn combustion chambers. Assembled versions include extra-long valves, 1.625" double springs, retainers, locks, and seals. Sold individually.
Intake Runner 335cc 355cc
Comb. Chamber
Port Type
Valve Angle
Intake Valve
Exhaust Valve 1.880" 1.880"
Part No.
Description
DRT19474030 DRT19574030
CNC Ported, Bare Head CNC Ported, Bare Head
119cc 119cc
Rect. Rect.
24°/15° 24°/15°
2.300" 2.300"
Assembled, CNC, 1.625" Double Spring, 275 lbs. Seat Pressure 355cc
DRT19574136
119cc
Rect.
24°/15°
2.300"
1.880"
207
2021-22 ENGINE BUILDER CATALOG
Made with FlippingBook flipbook maker