Inside the pocket of the intake has a ridge that produces a better swirl of air flow and a 1.600 exhaust valve with a smooth pocket to exit the gas quickly. These heads require a 0.100 longer than Stock Valve.
The exhaust and intake surface are flat and have been fully machined and will except a both Vortec style and a conventional style SBC intake. Head also features a deck thickness of. Spring seats are cut to 1.550 diameters to allow almost any spring combination. Note these heads have no steam holes so they will not work with the 400 ci engines.Intake Valve Diameter: 2.020 (up to 2.050 with machining, we do not offer this service). Exhaust Valve Diameter: 1.600.
Lighter than OEM Iron Heads. Each Head weighs 22 lbs. These cylinder head do not have 400 stem holes. We do not offer this service. Included: 2 - Bare Aluminum Heads.
Not included: Valves, Hardware, Springs and, Retainers. SBC engines 283, 302, 305, 327, 350, 383 & 400 up to 1986.
Southwest Performance Parts has set the pace for worldwide distribution of high performance automotive components for racing, street, and off-road use. Southwest Performance Parts extends excellent customer service and a complete line of high-quality products to speed shops, auto parts merchants, machine shops, and chassis and engine builders. Our web site has been designed as a resource for our customers. It contains information about our company, our products, our policies and services. We have described our product with all the details required for compatibility as best we can.
Most of our inventory features items that are a universal fit. But because of differences in manufacturing the Make, such as the Model and the Year, your specific vehicle may be incompatible with one of our universal items.
There, we can provide measurements, images, and other information that may not be included in the default listing to assist with determining compatibility. We can only send small items under 15oz to a PO Box. Special orders will take additional time to expedite and for customers to receive.
Customers will be contacted for verification and authorization. This will result in some items being received by customers at different times. At that time you must file a damage claim with them. If the shipper deems the packages to be lost, we will send out a replacement of the same item. Approximate time to your location.
Southwest Performance Parts is a company with deep roots in the performance aftermarket. We have been in the performance aftermarket for years. Today Southwest Performance Parts services engine builders, speed shops, machine shops, and shade tree mechanics with one simple business plan: Good people offering good pricing and good service on great products.Pricing: Southwest Performance Parts wants to be your online choice. All prices are subject to change without prior notice.
A Return Goods Authorization (RGA) number is required. If the new item is of higher value, you will be responsible for the price difference. Southwest Performance is not responsible for items not fitting or working correctly if the customer has given incorrect information or ordered incorrect parts.Mercruiser Chevy Volvo EST Marine Electronic Ignition Distributor EFI 4 CYL 3.0L. EST Marine Electronic Ignition Distributor & Coil Upgrade Kit V8 Mercruiser 5.7L. PV4 Universal GM CHEVY DISC/DISC BRAKE ACDELCO PROPORTIONING VALVE ALUMINUM. LSX LS LS1 LS6 Black Valve Cover Coil Covers GM Chevy Chevrolet Fabricated. This listing is currently undergoing maintenance, we apologise for any inconvenience caused.