AFR 260cc LSx Mongoose CNC Square-Port Heads, LS3/LSA/LS9 Applications

AFR 260cc LSx Mongoose CNC Square-Port Heads, LS3/LSA/LS9 Applications

SKU: AFR-1845

Availability: In stock

Product type: Cylinder Heads

Vendor: Airflow Research

Regular price $3,349.99

Assembled w/69cc Chamber #1845

Assembled w/69cc Chamber #1840 *6-Bolt*

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AFR 260cc LSx Mongoose CNC Square-Port Heads, LS3/LSA/LS9 Applications (PAIR)

AFR 260cc LS3 Mongoose cylinder heads are 100 percent 5-axis, CNC-ported, and feature titanium retainers, A356 aluminum castings, and Pac Racing springs. These CARB certified heads require 4.000 in. or larger bore applications on up through 454 cu. in. engines operating at or below 7,000 rpm—and flow over 380 cfm at 0.700 in. lift and are designed primarily for street and strip applications. Other structural features include Air Flow Research's trademark 3/4 in. thick head deck, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. Use of AFR stud girdles and full roller rocker arms are required. When it comes to building power, start with these AFR 260cc LS3 Mongoose cylinder heads.

260cc Large Bore Competition Flow Chart
	.200	.300	.400	.500	.600	.650	.700
Int	159	234	293	336	366	377	384
Exh	112	158	207	235	248	251	255

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe

Specifications & Features:
Material	A356 Aluminum
Intake Port Volume	260cc
Intake Port Dimension	2.610"H x 1.300"W x 7/16° Radius
Intake Port Location	Stock
Exhaust Port Volume	95cc
Exhaust Port Dimension	1.540" H x 1.760" W
Exhaust Port Location	Stock
Combustion Chamber Size	69cc
Valve Cover Bolt Pattern	Center Bolt
Valve Angle	12°
Valve Spring Pocket Diameter	1.490" O.D
Max Valve Spring Pocket Machining	1.510" O.D
Warning: Do not machine spring pad any deeper.
Deck Thickness	.750"
Minimum Bore Diameter	4.000"
Flat Mill - 65cc chamber	.006" per cc 62cc Maximum
Minimum Cross Sectional Area	2.875 sq. in.
Spark Plug Dimensions	14mm x .750" w/ Tapered or Gasket Seat

Cancellations: Orders canceled before being shipped will be assessed a 5% cancellation fee. This is to cover the processing fees.

Returns: After 30 days of purchase products cannot be returned. Used products are sold as is and are not returnable. All returns must be made within 30 days of purchase, include original undamaged packaging, and are subject to a 20% restocking fee . To have a return authorized call during normal business hours. Shipping charges are not refunded. After the products installed or used in any way they can not be returned. Refunds usually post within one billing cycle to your account. Contact us for return information and to receive an authorization number. Returns without an authorization number will not be accepted and will be refused for delivery.

Damage Claims: Should you receive a package from us which appears to be damaged, notify the courier or freight company prior to accepting delivery.

Warranty: Products are only warranted by the manufacturer's warranty. All products are for Racing and Performance applications only. Many of our manufacturers offer NO WARRANTY on their products, either stated or implied, due to the unusual stresses placed on the parts and because we have no control over how they are installed and used. Many of these products are designed for off-road use only are are not legal for use on public highways.

Your dealership can not void your warranty for products that do not cause a failure. For legal information in regards to this click here.