Please read the complete ad before purchasing. Valve sizes to use is 2.250 and 1.88. These heads have the correct seat diameter to allow use of these valves.
These are true multi-purpose heads for street, drag race, and power boat applications. This set is an excellent upgrade over OEM cast iron heads on your big block engine. We honestly feel there is not a better set of heads for the price. These heads are tried and proven.The intake runner volume is 300cc, and the combustion chambers are 119cc. You can reduce your engine weight by around 100 lbs. With the use of aluminum heads. You can also increase your power up to 250hp over an OEM 454 engine, depending on choice of cam and intake manifold. The horsepower gain from the weight reduction of aluminum heads alone is noticeable, not to mention the fact that aluminum heads will allow you to run a bit more compression without the risk of detonation. The benefits are many to running aluminum heads.
The most expensive cars in the world all run them. We are confident that we offer the best advice in the business.We also offer these heads in built form. We hope you will check out our other listings for the many other items we have available. SPEC INFO AND RECOMMENDED ACCESSORIES FOR FOR THESE HEADS. Intake Gasket: Felpro 1212 For oval port heads.
Depends on what type exhaust you're using. Best to try and match up the gasket to your header or exhaust manifold. Felpro 1017-1 for Mark V & VI blocks, or our PC-5211 MLS head gaskets for Mark V and earlier blocks.Most any oval port style intake will work. Our oval port aluminum intakes fit very well. See info in this listing for details on this. Most stock or aftermarket pistons. Our Wiseco pistons combine perfectly with these heads.
We have the correct pushrods needed. We strongly recommend Dart adjustable guide plates. Comp brand machined locks are used on all of our heads. 750reach, gasket, Autolite 3923 or NGK 4544 for one step lower heat range. See our other listings for these.Single for those running a hyd. 250 over intake valves, std length exhaust valves. Head Bolts = 65-70 ft/lb. Rocker Studs = 50 ft/lb. Weight: 70-72 lbs fully assembled pair. You may have noticed other sellers using a similar name offering similar products. These other sellers have capitalized on our name as we see it, and many customers searching for us will inadvertently find them, thinking we are one in the same company.
There is only one Skip White. Our official company name is Skip White Performance.We are not responsible for collateral damage caused by the use of this product. The RGA number must be included on the return label. Even though you may have explained the problem to us, and been granted permission to return the product, we must have a written explanation and a contact number included with the product.
It is also recommended that you include the name of the person from our company that you have been in contact with. Following these guidelines will make the return process work as it should.If you are in a 3 day zone, and your package leaves on a Thursday, you should receive it on the following Tuesday. The item "BIG BLOCK BBC CHEVY 454 496 300cc OVAL PORT ALUMINUM HEADS BARE SET" is in sale since Monday, January 9, 2017. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "skipwhite" and is located in Kingsport, Tennessee.
This item can be shipped worldwide.