Page 241 - 2020-2021 Racecar Engineering Drag Racing Parts and Accessories Catalog

2020 DRAG RACING

Pro 1 Cylinder Heads For LS
Although the Pro 1 for LS engines retains the OEM valve angles, OEM valve locations, and accessory
mounting holes, aluminum cylinder heads feature higher air flow and improved combustion chambers for
added horsepower. High-velocity 225cc heads provide increased throttle response, while larger 280cc
heads are best suited to larger displacement engines. Heads are sold individually, bare or completely
assembled.
Intake Comb. Intake Exhaust Valve Spring
Part No. Description Runner Chamber Valve Valve Dia./Type
DRT11020020 Bare Casting 225cc 62cc 2.050" 1.600" N/A
DRT11021122 Assembled 225cc 62cc 2.050" 1.600" Hyd. Roller/.625" Max Lift
Assembled/LS3
DRT11030153 280cc 68cc 2.165" 1.600" 1.295"/Hyd. Roller
Compatible
Iron Eagle And Iron Eagle Pro Cylinder Heads For BB Chevy
Versatile cast iron heads have rectangular intake ports, rolled valve angles and .300" raised exhaust
ports for maximum performance. 308cc or 345cc intake runner heads have heart-shaped 119cc
combustion chambers. High-velocity 308cc head works well for street or mild bracket racing, while
larger 345cc heads are ideal for bracket competition. Sold individually, bare or fully assembled.
Intake Comb. Intake Exhaust Valve Spring
Part No. Description Runner Chamber Valve Valve Dia./Type
Iron Eagle Cylinder Heads
DRT15100010 Bare Casting 308cc 119cc 2.25" 1.88" N/A
DRT15100111 Assembled 308cc 119cc 2.25" 1.88" 1.550"/Single
DRT15100112 Assembled 308cc 119cc 2.25" 1.88" 1.550"/Double
DRT15200030 Bare Casting 345cc 119cc 2.30" 1.88" N/A
DRT15200132 Assembled 345cc 119cc 2.30" 1.88" 1.550"/Double

Pro 1 Cylinder Heads For BB Chevy
Championship-winning technology in an affordable package. Aluminum heads feature 2° rolled valve
angles, .300" raised exhaust ports and fast-burn combustion chambers. Available in five different
intake runner volumes for a wide variety of applications, heads are also offered in fully CNC-ported
versions to maximize performance. Bare castings have multi-angle valve job and bronze valve guides.
Assembled versions have extra long valves, springs, retainers, locks, and seals. Sold individually, bare
or fully assembled.
Intake Comb. Intake Exhaust Valve Spring
Part No. Description Runner Chamber Valve Valve Dia./Type
Pro 1 Cylinder Heads
DRT19100010 Bare Casting 310cc 119cc 2.25" 1.88" N/A
DRT19100112 Assembled 310cc 119cc 2.25" 1.88" 1.550"/Dual
DRT19200010 Bare Casting 325cc 119cc 2.25" 1.88" N/A
DRT19200116 Assembled 325cc 119cc 2.25" 1.88" 1.625"/Dual
DRT19300030 Bare Casting 345cc 119cc 2.30" 1.88" N/A
DRT19300136 Assembled 345cc 119cc 2.30" 1.88" 1.625"/Dual
CNC-Ported
DRT19474030 Bare Casting 335cc 121cc 2.30" 1.88" N/A
DRT19574030 Bare Casting 355cc 121cc 2.30" 1.88" N/A
DRT19574136 Assembled 355cc 121cc 2.30" 1.88" 1.625"/Dual
*Oval port runner design

Pro 2 Cylinder Head For BB Chevy
DRT19674080
Specifically engineered for maximum performance bracket racing, Super classes or heads-up drag
racing, Pro 2 24° cylinder heads feature large, 380cc intake runners, fully CNC-machined ports and
combustion chambers. Sold individually as bare castings, heads are machined for 2.350" intake and
1.850" exhaust valves.

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