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 flow 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 Runner
Comb. Chamber
Intake Valve
Exhaust Valve
Valve Spring Dia./Type
Part No.
Description
DRT11010010 Bare Casting 205cc DRT11020020 Bare Casting 225cc DRT11021122 Assembled 225cc
62cc 2.020" 1.600" 62cc 2.050" 1.600"
N/A N/A
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 Runner
Comb. Chamber
Intake Valve
Exhaust Valve
Valve Spring Dia./Type
Part No.
Description
Iron Eagle Cylinder Heads DRT15100010 Bare Casting
308cc 308cc 308cc 345cc 345cc 345cc
119cc 119cc 119cc 119cc 119cc 119cc
2.25" 2.25" 2.25" 2.30" 2.30" 2.30"
1.88" 1.88" 1.88" 1.88" 1.88" 1.88"
N/A
DRT15100111 DRT15100112
Assembled Assembled
1.550"/Single 1.550"/Double
DRT15200030 Bare Casting
N/A
DRT15200132 DRT15200136
Assembled Assembled
1.550"/Double 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 Runner
Comb. Chamber
Intake Valve
Exhaust Valve
Valve Spring Dia./Type
Part No.
Description
Pro 1 Cylinder Heads DRT19900010*
Bare Casting Bare Casting
275cc 275cc 310cc 310cc 325cc 325cc 345cc 345cc 335cc 355cc 355cc
110cc 110cc 119cc 119cc 119cc 119cc 119cc 119cc 121cc 121cc 121cc
2.250" 2.190"
1.880" 1.880"
N/A N/A N/A
DRT19900070*
DRT19100010 Bare Casting
2.25" 2.25" 2.25" 2.25" 2.30" 2.30" 2.30" 2.30" 2.30"
1.88" 1.88" 1.88" 1.88" 1.88" 1.88" 1.88" 1.88" 1.88"
DRT19100112
Assembled
1.550"/Dual
DRT19200010 Bare Casting
N/A
DRT19200116
Assembled
1.625"/Dual
DRT19300030 Bare Casting
N/A
DRT19300136
Assembled
1.625"/Dual
CNC-Ported DRT19474030 Bare Casting DRT19574030 Bare Casting
N/A N/A
DRT19574136
Assembled
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.
235
Made with FlippingBook flipbook maker