9 Degree Billet Chevrolet Heads
There are many good Chevrolet cylinder heads out there many of them available from Ultra Pro Machining. But with the success of our line of Billet Ford cylinder heads we just had to apply the same technology to a Chevrolet engine. Now after several months of development and dyno testing Don Losito has created a revolutionary package for Chevrolet engines, the 9 Degree Billet Chevrolet. Independent dyno testing and racing has show gains of 80+ horsepower over conventional 18-degree heads, improved throttle response and better drivability. Just like our Billet Ford line these heads are stronger, race longer, and will outperform any other cylinder head on the racetrack. These heads with their available port and valve sizes can be custom tailored to suit nearly any racing application from small cubic inch high rpm engines to big cubic inch dirt late model, offroad truck, and drag racing engines. These heads can even be used for the ultimate street engine. Get yours today before your competition does.
| Block Use | Any SBC (4.400 Bore Spacing) |
|---|---|
| Valve Angle | 9° Parallel Valve |
| Intake Valve Diameter | 2.200”, 2.230” Titanium Valves |
| Exhaust Valve Diameter | 1.625" Titanium Valves |
| Chamber Volume | 30cc to 52cc |
| Milling | Approx. 0.0005" Per cc |
| Intake Port Volume | 299cc |
| Intake Port Dimensions | 2.245 x 1.440 |
| Exhaust Port Volume | 215cc |
| Exhaust Port Dimensions | 1.725 x 1.645 |
| Intake Gasket | 0.039”, 0.047”, 0.060”, 0.094”, 0.125” , 0.188” |
| Exhaust Gasket | Stahl or Conventional Chevrolet Pattern |
| Head Gasket | Any 2.400" Bore SBC |
| Head Studs | Available From ARP |
| Lifters | Intake 0.150" Offset |
| Manifold | 2 Piece Cast Manifold For 8.200" to 9.200" Deck Height |
| Pistons | 9° Piston Available From Diamond Pistons and CP Pistons |
| Push Rods | Clearance For 7/16" Pushrods |
| Rocker Arms | Available From T&D Machine and Jesel Valvetrain |
| Spark Plug | 3/4" Reach 14mm |
| Spring Pockets | 1.625" |
| Valve Length | 5.840" |
| Valve Stem Diameter | 7mm to 11/32" |
| Valve Guides | Maganese Bronze |
| Valve Seats | Beryllium Copper or Ductile Iron |
| Valve Seat Angles | 50° or 55° |
| Intake Valve Seat Dimensions | 2.350" 0.500" Thick |
| Exhaust Valve Seat Dimensions | 1.680" 0.500" Thick |
| Weight | 36 Pounds |
| Lift (Inches) | Intake (2.200") | Exhaust (1.625") |
|---|---|---|
| .100 | 70.4 | 54.1 |
| .200 | 153.3 | 102.7 |
| .300 | 227.5 | 156.1 |
| .400 | 300.3 | 209.2 |
| .500 | 360.4 | 242.8 |
| .600 | 406.3 | 265.7 |
| .650 | 409.6 | 272.8 |
| .700 | 421.0 | 278.7 |
Ultra Pro Machining, Inc.
Tel: 704-392-9955
