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NEW AFR 4.8L/5.3L Small Bore 214cc Aluminum Cylinder Heads

This auction is for a pair of Brand New AFR’s 214cc LS cylinder head package goes beyond a traditional upgrade. Complete Precision Street CNC porting works to create a smoother, more efficient airflow path from intake to valve, improving cylinder fill, combustion efficiency, and overall engine response. The result is a strong, usable mid-range and stable, repeatable top-end performance up to 6,500 RPM, making this package ideal for street, street/strip, and towing applications.

Built from the same robust permanent-mold casting as the rest of the Mongoose family, the AFR 214cc LS head features a .750" deck thickness to support boost and nitrous with confidence. Designed to support engine combinations up to 383 cubic inches, it delivers modern AFR technology in a cost-effective alternative to reworked factory heads, without compromising drivability or durability.

Wholesale Distribution available, contact us and we can create a special listing for you!

  

Wholesale Distribution available, contact us and we can create a special listing for you!

Complete Precision Street CNC porting works to create a smoother, more efficient airflow path from intake to valve, improving cylinder fill, combustion efficiency, and overall engine response. The result is a strong, usable mid-range and stable, repeatable top-end performance up to 6,500 RPM, making this package ideal for street, street/strip, and towing applications.

214cc 4.8L/5.3L Small Bore Street Head Flow Chart
  .200 .300 .400 .500 .550 .600
Int 156 206 237 271 283 293
Exh 119 160 192 214 219 225

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe 

Basic Package Components Part #
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
 
8mm LSx 2.000 OD Int Valve - 4.900" OAL, For Small bore 5.3L engines AFR #7236
8mm LSx 1.570 Exh Valve - 4.915" OAL, For Small bore 5.3L engines AFR #7235
Pacaloy Hydraulic Roller Spring 1.290 O.D., Premium Grade Chrome Silicon AFR #8017
Steel 7 degree Retainer 1.245 OD x .880 ID x .655 ID AFR #8514
7° Bead Lock Valve Keepers AFR #9007*
Viton Valve Seals .600" O.D x .495" I.D AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D AFR #8042

Specifications, Features, and Optional Supporting Components
Head Material

A356 Aluminum

Intake Port Volume

214cc

Valve Spring Type .600 Max Lift Hydraulic Roller
Intake Port Dimension 3.275"H x 1.120"W x5/16 top 3/8 bottom
Intake Port Location

Stock

Exhaust Port Volume 90.2cc
Exhaust Port Dimension 1.415" H x 1.710" W
Exhaust Port Location

Stock

Combustion Chamber Size

65cc

Valve Cover Bolt Pattern

Center Bolt

Valve Angle 15°
Valve Spring Pocket Diameter 1.510" O.D
Max Valve Spring Pocket Machining 1.525" O.D
Deck Thickness
.750"
Minimum Bore Diameter 3.780"
Spark Plug Dimensions

14mm x .750" w/Tapered seat

Head Gasket Cometic 3.930 Bore Size
Intake Port Gasket

GM or Cometic

Exhaust Port Gasket

GM#12558573

Head Bolts (97-03)

AFR #6330

Head Studs (97-03)

AFR #6331

Head Bolts (04+)

AFR #6334

Head Studs (04+)

AFR #6335

Head Bolt Washers, Manley

AFR #6320

Suggested Manifold

FAST 90mm, 92mm, or 102mm

Spark Plug Starting Range NGK TR55 
Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match an AFR head.
Warning:Do not machine spring pad any deeper.
Note: Milling head deck will affect flow numbers.



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-IN STOCK ITEMS- Ship no later than the second business day after receiving cleared payment.
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We observe all major holidays; please contact us before bidding if you are unsure of when your item will ship.

Domestic Shipping Options (Please note that day one is the day after the item ships):

-UPS Ground- 1-7 days. Check at www.ups.com for your location.
-USPS Priority Mail- 1-4 days but no detailed tracking with this service.
-USPS Express Mail- 1-3 days and more detailed tracking than priority.
-UPS Next Day Guaranteed- Order by 12pm Pacific Time to ship the same day for next day guaranteed delivery!
UPS Ground and USPS Priority Mail do not have a guaranteed shipping timeframe. If you need your item ASAP in a guaranteed number of days we highly recommend upgrading to USPS Express Mail or UPS Next Day.

International Shipping Services:

-USPS Priority Mail- 6-10 days typical delivery time, but as long as one month on rare occasions. BUYER BEWARE - NO TRACKING with this service.
-USPS Express Mail- HIGHLY RECOMMENDED 3-5 days typical delivery time with tracking, but as long as 2-3 weeks on rare occasions.
-USPS Global Express Guaranteed- 1-3 days GUARANTEED! (Most Countries, check USPS.com)
If available, this shipping service is listed in eBay auctions as "Expedited Int'l Flat Rate Shipping"
Since USPS Priority Mail International does not have tracking we strongly recommend upgrading international shipping to USPS Express Mail or to USPS Global Express Guaranteed.

International Information:

We will ship any part from any auction to anywhere in the world!
All customs fees are paid by the receiver.
Please research your customs fees with your local government before ordering so you know what to expect to pay once the shipment arrives.
We do not lower invoice values since it is a violation of US and International custom laws.
All international shipments are shipped with the correct value for the parts shipped.