CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
Our largest and most powerful 60/40 head for the small block Chevy features 100% CNC machined intake runners, exhaust ports and combustion chambers. Capable of flowing 350 CFM at 0.800" of lift these heads come equipped with Titanium retainers and high quality components throughout, the 60/40 valve spacing which requires shaft mounted rocker arms for optimum valve train geometry and extra machining for 3/8" pushrod clearance. NPP stands for "no pushrod pinch."
| 245cc NPP Aluminum SBC Cylinder Heads | |||
|---|---|---|---|
| Part # | Exhaust Port | Porting Finish | Combustion Chamber |
| 1137-TI | Stock | Competition | 70cc |
| 1138-TI | Stock | Competition | 80cc |
| 1139-TI | Spread Port | Competition | 70cc |
| 1140-TI | Spread Port | Competition | 80cc |
Click part # to add product to your cart
| 245cc Race Head Flow Chart | |||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | .800 | |
| Int | 161 | 224 | 271 | 305 | 320 | 330 | 336 | 341 | 345 |
| Exh | 128 | 181 | 214 | 235 | 242 | 247 | 251 | 254 | 256 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5-angle Valve Job | |
| 8mm Bead Lock Intake Valve, 2.125" x 5.000" Overall Valve Length |
7253
|
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length |
7254
|
| PAC Racing Springs 1.550" OD Solid Roller Dual Valve Spring Pac #1225, 250 lbs on seat, .800" maximum lift, Max RPM 8000-8200 |
8001
|
| 10° Titanium Retainers 1.490" O.D x 1.115" I.D x .745" I.D |
8505
|
| 10° Bead Lock Valve Keepers with lashcap recess |
9009
|
| Viton Valve Seals .600" O.D x .495" I.D |
6612
|
| Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D |
8048
|
| Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x.375" Deep |
9060
|
| Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep |
9070
|
| 8mm Bronze Valve Guides .502" O.D x 2.100" O.A.L |
9051
|
| Recommended Components: | |
| 1.5 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters) |
6062
|
| 1.6 T&D Shaft Mount w/ .450" off-set (requires .180 offset lifters) |
6063
|
| 1.6 T&D Shaft Mount w/ .550" off-set |
6064
|
| Intake Gasket 1.310 x 2.180 w/ 3/8" radius, Fel-Pro #1206 |
6820
|
| Exhaust Port Gasket, Fel-Pro #1405 |
6835
|
| Head Gasket, 350cid Fel-Pro #1004 |
6801
|
| Head Gasket, 400cid Fel-Pro #1014 |
6802
|
| SB Chevy Head Bolt Kit, ARP #134-3701 |
6310
|
| SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 |
6305
|
| Head Bolt Washers, Manley |
6320
|
| Suggested Manifold |
AFR Titan TXR #4801
|
| Suggested Manifold |
AFR Titan TXS #4802
|
| Spark Plug Starting Range |
Autolite 3922
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
245cc
|
| Intake Port Dimension |
2.200" H x 1.300" W 7/16 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
80cc
|
| Exhaust Port Dimension |
1.465" H x 1.570" W
|
| Exhaust Port Location |
.250" Raised
|
| Combustion Chamber Size |
70cc or 80cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
23°
|
| Valve Spring Pocket Diameter |
1.580" O.D
|
| Max Valve Spring Pocket Machining |
1.680" O.D
|
| Warning: Do not machine spring pad any deeper. | |
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 65cc Maximum
|
| Angle Mill |
.009" per cc 60cc Maximum
|
| Note: Angle mills might require .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.730 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| Carb EO# |
Non Emissions Compliant
|
SHIPS IN THE LOWER 48 STATES FREE!
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER
Warning: May cause cancer and reproductive harm.
