Page 237 - 2018 Racecar Engineering Drag Racing Parts and Accessories Catalog

Pro 1 Cylinder Heads For LS1
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 fl ow and im-
proved combustion chambers for added horsepower. High velocity, 205cc heads provide
increased throttle response, while larger, 225cc heads are best suited to larger displace-
ment engines. Heads are sold individually, bare or completely assembled.
Intake Comb. Intake Exhaust Valve Spring
Part No. Description Runner Chamber Valve Valve Dia./Type
DRT11010010 Bare Casting 205cc 62cc 2.020" 1.600" N/A
DRT11020020 Bare Casting 225cc 62cc 2.050" 1.600" N/A
DRT11021122 Assembled 225cc 62cc 2.050" 1.600" Hyd. Roller/.625" Max Lift

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, while Iron Eagle Pro 330cc heads fea-
ture CNC-machined intake and exhaust ports. High velocity 308cc head works well for
street or mild bracket racing, while larger 330cc and 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
DRT15200136 Assembled 345cc 119cc 2.30" 1.88" 1.625"/Double
Iron Eagle Pro Cylinder Heads
DRT15372136 Assembled 330cc 126cc 2.30" 1.88" 1.650"/Triple
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 six different intake runner volumes for a wide variety of appli-
cations, 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
DRT19900010* Bare Casting 275cc 110cc 2.250" 1.880" N/A
DRT19900070* Bare Casting 275cc 110cc 2.190" 1.880" N/A
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
Specifi cally 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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