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(294115) 99.5%,

Location: Lincoln, Nebraska
Ships to: US,
Item: 134129372436

Return shipping will be paid by:Seller
Returns Accepted:Returns Accepted
Item must be returned within:30 Days
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Air Flow Research:Air Flow Research
Manufacturer Part Number:1501
Type:Cylinder Heads
Finish:Natural
Material:Aluminum
California Prop 65 Warning:True

Stock GM Rocker Arms – GM Rocker Arms are not designed/engineered to accommodate aftermarket cams or higher spring pressures. At a minimum AFR recommends using Bushing Trunion Kit. Other available options are aftermarket kits from Yella Terra, Scorpion or Hardland Sharp. Without the proper parts you will experience accelerated guide wear., Does not have provisions for 1997-1998 perimeter bolt valve covers, conversion kits available. AFR 1501 LS1 210 Enforcer Heads, Cathedral Port, Assembled Sku # 1631501 Mfr. Part # 1501 Condition New Brand Air Flow Research Sold Each Details Info AFR’s 210 LS1 Enforcer Cylinder Heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as PAC Racing springs, viton valve seals, machined bead valve locks (not stamped), hardened spring seats and our one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Sold as a single piece, 2 are required per engine. Please see footnotes for additional information. AFR LS1 Stock GM Rocker Arms – GM Rocker Arms are not designed/engineered to accommodate aftermarket cams or higher spring pressures. At a minimum AFR recommends using Bushing Trunion Kit. Other available options are aftermarket kits from Yella Terra, Scorpion or Hardland Sharp. Without the proper parts you will experience accelerated guide wear. Does not have provisions for 1997-1998 perimeter bolt valve covers, conversion kits available. General Recommendations for AFR Cylinder Heads: Bar Codes – Please keep the bar code & paperwork shipped with your head, these contain all the specs for your heads when calling AFR. High Volume/Pressure Oil Pumps – If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end/valve train components. Pushrods – Different length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120″ thick-wall pushrods. Mills – Flat or angle mills could affect flow numbers and might require a thicker intake gasket. Stud Girdles – Due to many available factory OEM and aftermarket style/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles) Boosted/Nitrous Applications – We strongly recommend considering Inconel exhaust valves and AFR’s optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs. All MARINE Applications – We strongly recommend Inconel exhaust valves & also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below. Valve Guide Clearance – Your AFR Heads come with proper guide clearance (.0012″-.0016″) for most applications. Boosted/Nitrous or marine applications might require additional clearance and it is the customer’s responsibility to verify proper clearance in these applications. Valve Springs – Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don’t hesitate to contact us directly if you question which spring is correct for your application. AFR Titanium Valves – Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating. Piston to Valve – AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080″ on the intake valve and .100″ on the exhaust with a radial clearance of .020″ minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed. It is the customers responsibility to verify proper piston to valve clearance. CNC Porting – Occasionally a 100% CNC ported head might have a very small area left “as cast”, this in no way affects performance. Shaft Mount Rockers – Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060″ thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series. Comp Cams Pro Magnum Rockers – Typically these rocker arms do not clear a 1.500″ O.D retainer. A lash cap is required to space up the rocker arm. Spring Installation – To ease installation with 1.550″ O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn’t need to be ground) Valve Spring Installed Heights – AFR valve spring installed height spec is +/- .015 which is the smallest shim available for adjustment. Rocker Arms – Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended. THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. Charts (PDF) Specs Material Type Aluminum Sold in Quantity Each Finish Natural Cylinder Head Style Assembled Spark Plug Style Angle Combustion Chamber Volume 64cc Intake Port Location Standard Exhaust Port Location Standard Number of Springs Per Valve Dual Retainer Material Chromoly Steel Lock Style 7 Degree Valve Stem Seal Material Viton Valve Stem Seal Type Positive Stop Valve Seat Machine Style 3-angle Valve Seat Material Ductile Iron Oiling Style Through Pushrod Combustion Chamber Style Heart Valve Cover Mounting Style Center Bolt Exhaust Port Shape Round Intake Port Shape Cathedral MFG. Part # 1501 CNC-Machined Combustion Chamber No Intake Valves Included Yes Valve Spring Included Yes Damper Spring Included No Retainers Included Yes Locks Included Yes Rocker Arm Studs Included No Rocker Arm Nuts Included No Guideplates Included No Accessory Bolt Holes Drilled Yes Valve Seats Machined Yes Steam Holes Drilled No Machined for O-Ring No Heat Crossover No Valve Guides Included Yes Valve Stem Seals Included Yes Intake Valve Diameter 2.02 Exhaust Valve Diameter 1.6 Valve Guide Material Bronze Exhaust Valves Included Yes Rocker Arms Included No Intake Runner Volume Range 210cc – 219cc Exhaust Runner Volume Range 80cc – 89cc Combustion Chamber Volume Range 60cc – 69cc Exhaust Runner Volume 82cc Intake Runner Volume 210cc CNC-Machined Runners No Spring Diameter 1.29 Maximum Lift 0.600 Intake Valve Angle 15 Exhaust Valve Angle 15 Tech Support We’re here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through eBay Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.

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