Since 2007, our STEALTH aluminum cylinder heads have been hands down the best bang for the buck you can find!
We now offer this FULLY ASSEMBLED version with DUAL VALVE SPRINGS, 10 DEGREE VALVE LOCKS, and Teflon Seals, designed to work with most all Flat Tappet and Roller Cams in the .500" to .650" lift range. We always recommend checking your cam manufacturer's recommendation for matching valve springs, locks and retainers.
Capable of an easy 550 horsepower (when used with our 500+ inch stroker kits) these have the potential to make 650-700+ horsepower with port work and upgrades. 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, Double Valve Springs with damper, Spring Locators, Valve Seals, Valve Retainers, and 10 Degree Super 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.
Check out our CYLINDER HEADS Frequently Asked Questions page (Click here)
| 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 (although we don't recommend using stamped steel factory type rockers with any cam over .500" lift.) Heat crossover is blocked off for increased performance. Factory port windows, 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, one of these heads weighs only 22 pounds bare or 29 pounds complete with valves and springs. |
| Large, free-flowing intake and exhaust ports look nicer "out of the box" than most port jobs you'll find done to factory heads. Instead of casting the ports small (like the factory did) and having to port them yourself, we've designed the ports to flow out of the box, better than a "full race" ported factory head would. Port volumes are about 212CC's on the intake and 72CC's on the exhaust. Intakes flow about 280-290 CFM as cast, with the potential to reach at least 330 CFM or more with porting. Compare that to 215-220 CFM from even the best factory production heads such as 906's or even 915's! 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. |
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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. |
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Cylinder Head Technical Specs: |
| Intake Port Flow (at peak ~600 lift): |
290CFM @ 28" of water |
| Intake Port CC: |
212CC* |
| 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: |
Premium 101-1049 TEFLON type "PC" Seals. Positive Locking type, maintains contact at all times with the valve and guide. |
| Intake Valve Type: |
1 piece forged 21-4N stainless, swirl polished heads, hardened tips. |
| Intake Valve Locks |
10 Degree Super Locks. We always recommend checking your cam manufacturer's recommendation for matching valve springs, locks and retainers. |
| Exhaust Port Flow (at peak ~600 lift): |
220CFM @ 28" of water |
| Exhaust Port CC: |
72CC* |
| Exhaust Valve Head Size: |
1.81" |
| Exhaust Valve Type: |
1 piece forged 21-4N stainless, swirl polished heads, hardened tips. |
| Exhaust Valve Locks |
10 Degree Super Locks. We always recommend checking your cam manufacturer's recommendation for matching valve springs, locks and retainers. |
| Exhaust Valve Stem Size |
11/32", undercut near valve head. |
| Exhaust Valve Seals Type: |
Premium 101-1049 TEFLON type "PC" Seals. Positive Locking type, maintains contact at all times with the valve and guide. |
| Exhaust Valve Guide Type: |
.530" OD Manganese Bronze |
| Valve Spring Type: |
Double Spring with Damper for most all flat and roller cams from .500"-.650" lift. We always recommend checking your cam manufacturer's recommendation for matching valve springs, locks and retainers. |
| Valve Spring Closed (seat) Pressure: |
Approx. 130 pounds @ 1.875" installed height |
| Valve Spring Open Pressure |
Approx. 374 pounds @ 1.225" (.650" lift.) |
| Spring Pressure @ 1.800" |
Approx. 158 pounds |
| Spring Pressure @ 1.700" |
Approx. 195 pounds |
| Spring Pressure @ 1.600" |
Approx. 233 pounds |
| Spring Pressure @ 1.500" |
Approx. 270 pounds |
| Spring Pressure @ 1.400" |
Approx. 308 pounds |
| Spring Pressure @ 1.300" |
Approx. 345 pounds |
| Spring Pressure @ 1.200" |
Approx. 383 pounds |
| Inner Valve Spring Inner Diameter: |
.780" |
| Valve Spring Coil Bind Height: |
Under 1.000" |
| Valve Spring Outer Diameter: |
1.520" |
| Valve Spring Free Height |
2.300" |
| Valve Spring Installed Height: |
1.875" |
| Valve Spring Wire Diameter: |
.195" |
| Valve Spring Number of Coils: |
5 |
| Deck Thickness: |
.625" |
| Chamber Volume: |
80CC* |
| Chamber Type: |
Closed (with quench surface) |
| Weight (bare): |
22 pounds |
| Weight (assembled): |
29 pounds |
| 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. |
