CNC Ported Stealth Aluminum Cylinder Heads pair for Mopar Big Block 440 400 383

Description: For over a decade now, our STEALTH aluminum cylinder heads have been hands down the best bang for the buck you can find! Now available in a FULLY CNC PORTED version!! Shown below are detailed pictures and specs on these exciting heads. Our Stealth Cylinder heads are rated as one of the Top Ten aftermarket Mopar parts by Mopar Collectors Guide Magazine!! Complete cylinder heads include Stainless Valves, Valve Springs, Valve Seals, Valve Retainers, and USA MADE Comp Cams Valve Locks. Heads are assembled and ready to bolt on the engine. Rocker arms & shafts, head bolts, valve covers, spark plugs, etc. are not included with assembled heads. This auction is for one PAIR (two) heads. Buy with confidence! 440 Source has been on ebay since May 1st, 1999! We are the Big Block Mopar parts experts. We've sold over 33 MILLION DOLLARS of Big Block Mopar parts, we know this engine backwards and forwards. Take a look at our web store for every big block part you could possibly need! New Page 1 CNC Machined Cylinder Heads We've taken something great and made it even better! Now our heads are available fully CNC Machined on both the intake and exhaust ports. Part No: 200-1080 - Stealth Aluminum Cylinder Head - CNC PORTED - ASSEMBLED Over a pound of aluminum is removed from the ports during CNC machining, taking over 43cc's out of the port. This enlarges the intake ports from the stock 212cc's out to 255cc's! Because the automated machine which does the porting is fully computer controlled, it can produce results which are identical and repeatable down to accuracies measuring in the thousandths of an inch. This means all ports will be exactly the same shape and volume, ensuring the flow numbers are consistent and accurate for EVERY port on EVERY head. Another view from the port window side of the intake port shows what a straight shot the intake port has. An intake port that flows over 320 CFM will put the average stroker motor well into the high 600 to low 700 horsepower range. The exhaust ports are just as nice as the intakes. Clearanced for large diameter valve springs, our Stealth heads use factory type rocker arms and stock diameter shafts, so no special "high-dollar" offset rockers are required. Any rockers that work on a stock Mopar head will work on our heads. This includes roller rockers, or even stock type stamped steel rockers. Heat crossover is blocked off for increased performance. Exhaust and intake manifold locations make sure you can use any "off the shelf" intake manifold and/or exhaust manifold/headers without any fitment hassles or special "spacers" required. Made of lightweight aluminum alloy. Larger 2.14" and 1.81" valve sizes also come standard. Combustion chamber is a "closed chamber" design, with quench area built in, so the benefits of running "tight quench" can be realized. As with any closed chamber head, pistons with a raised quench pad cannot be used. If you have any questions about your application or piston type, please give our tech line a call. Chamber size "as cast" is about 80cc's. All standard factory mounting locations for alternator, etc are in place. Head is shown bare for display purposes, however this auction is for a fully assembled CNC ported set of 2 heads. Super thick 5/8" deck surface ensures these heads have tons of meat in the deck to withstand high compression, nitrous, or to allow for plenty of milling. Use this feature to reduce the chamber size.. (great for getting high compression ratios AND great flame travel with a flat-top piston.) The straight (100% factory) spark plug location puts an end to hassles with header tubes fitting correctly, AND ensures the spark plug relief cut in domed pistons doesn't require any modification. Exhaust bolt holes are are heli-coiled for extra strength, AND we've made them blind, so you can say goodbye to coolant leaking all over when changing headers or header gaskets. Cylinder Head Technical Specs: Intake Valve Head Size: 2.14" Intake Valve Stem Size: 11/32", undercut near valve head. Intake Valve Guide Type: .530" OD Manganese Bronze Intake Valve Seals Type: Positive Locking type, maintains contact at all times with the valve and guide, reduced diameter compatible with most dual valve springs. Intake Valve Type: 1 piece forged 21-4N stainless, swirl polished heads, hardened tips. Intake Valve Locks We now include as standard: COMP CAMS USA MADE 7 degree, single groove, chrome-moly steel, case hardened locks. Recommended for maximum .510" lift. Over .510" lift we recommend upgrading to our 145-1002 Comp Cams 10 degree locks (per Comp's recommendation.) Exhaust Valve Head Size: 1.81" Exhaust Valve Type: 1 piece forged 21-4N stainless, swirl polished heads, hardened tips. Exhaust Valve Locks We now include as standard: COMP CAMS USA MADE 7 degree, single groove, chrome-moly steel, case hardened. Recommended for maximum .510" lift. Over .510" lift we recommend upgrading to our 145-1002 Comp Cams 10 degree locks (per Comp's recommendation.) Exhaust Valve Stem Size 11/32", undercut near valve head. Exhaust Valve Seals Type: Positive Locking type, maintains contact at all times with the valve and guide, reduced diameter compatible with most dual valve springs. Exhaust Valve Guide Type: .530" OD Manganese Bronze Valve Spring Type: Single with Damper. Recommended for maximum .510" lift, hydraulic flat tappet cams only. Over .510 lift, a dual spring is required, so we recommend upgrading to our 145-1013 Comp Cams Dual Valve Springs (per Comp's recommendation.) Valve Spring Closed (seat) Pressure: Approx. 130 pounds @ 1.875" installed height Valve Spring Open Pressure Approx. 330 pounds @ 1.275" (.600" lift.) Valve Spring Inner Diameter: 1.050" Valve Spring Maximum Lift: .510" Valve Spring Coil Bind Height: 1.130" Valve Spring Outer Diameter: 1.550" Valve Spring Free Height 2.400" Valve Spring Installed Height: 1.875" Valve Spring Wire Diameter: .202" Valve Spring Number of Coils: 5.5 Deck Thickness: .625" Chamber Volume: 80CC* Chamber Type: Closed (with quench surface) Aluminum Type A-356 *Due to normal casting processes such as core shift, etc, all CC volumes listed are approximate and subject to some variation from cylinder to cylinder. We do not guarantee a specific chamber size.

Price: 2399 USD

Location: Carson City, Nevada

End Time: 2024-09-12T19:19:59.000Z

Shipping Cost: N/A USD