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1725 Monrovia Ave. STE D7

Costa Mesa, CA 92627

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  • Dec 02 2014

    Bassani 2015 Mustang GT Exhaust Systems

    Just released: 2015 Mustang GT Bassani Exhaust!!! Complete kits with long tube headers and 3" x crossover, or just a 2.5" x-pipe catback upgrade. Plus 2011-2014 also in stock and ready to ship:

  • Nov 06 2013

    New High Performance Fuel Injectors!

    We now have a full line of high performance TREperformance Fuel Injectors. We have skinny style EV1 Bosch fitment 19lb, 24lb, 30lb, 36lb, 42lb, 60lb, and 80lb/hr injectors for many applications, including Camaros, Corvettes, Mustangs, etc. We also have Wide Body Bosch style and Wide Body Denso style from 200cc up to 1600cc for high horsepower race cars also. If you do not see what you are looking for on our website, just shoot us an email and we probably have what you need! Thanks, Nick

  • Nov 06 2013

    TREperformance New Store Location

    TREperformance Inc. has moved to a brand new warehouse down the street from our old location. Come on in and checkout the new shop, and don't mind our dog Sparky, he's a Golden Retriever/Chow mix who is friendly as can be once you meet him! The shop is at the very back when you make the turn into the parking lot. If you are in the Huntington Beach/Costa Mesa/Newport Beach area, stop by our new storefront and warehouse location: 1725 Monrovia Ave. Suite D7 Costa Mesa, CA 92627  

    AFR 245cc SBC Chevy Aluminum Competition Package Eliminator Cylinder Heads 245 cc 1137 1138 - Air Flow Research -

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AFR 245cc SBC Cylinder Heads

These are the *BRAND NEW* Eliminator AFR 245 cc competition package aluminum cylinder heads which include the all new LS1 style lightweight valvetrain with 8mm valves, lightweight springs, matching retainers and pacaloy solid roller springs which are good for .800 max lift. Includes 100% CNC ported combustion chambers, intake ports, and exhaust ports along with a competition 3 angle radiused valve job. Includes 7/16 rocker studs, guide plates, 1.550" OD solid roller dual valve springs (250 lbs. on seat, .800" maximum lift), 2.125" intake valves, 1.600" exhaust valves, 70cc or 80cc combustion chambers, 80cc exhaust ports, 10 degree 4140 chrome moly steel retainers and 10 degree Bead Locks Valve Keepers with bronze valve guides.

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Shipping: FREE continental USA ground shipping on ALL AFR Cylinder Heads
Was: $2,625.00
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The Best 23° AFR Head Ever Produced!
AFR is proud to introduce the new 245 NPP (no pushrod pinch); best suited for max effort applications, but larger displacement 427+ pump gas engines could consider this head as well. This exciting product represents the best flowing 23° SBC head to date and while flow numbers may reflect a very good 18° head of the past, this head is still a conventional direct bolt on non-raised runner intake port configuration. It will drop on your 23° shortblock as easily as the 227cc or 235cc AFR SBC product and in fact shares indentical valve centerlines and rocker stud locations to both of those heads. However, unlike the 227 and 235 cc heads, this product will not accept stud mount style rockers and a shaft mount rocker system with the proper intake offset must be used. This is primarily due to the enlarged and widened pushrod pinch removing that checkpoint in the entrance of the intake allowing AFR to design a port with a more direct shot at the back of the valve that also has a more consistent cross sectional area and velocity profile. In addition, this head comes standard with a 3/4 inch deck, 2.125 intake and 1.600 exhaust. If you are unsure if this is the right AFR head for you, we encourage you to contact us directly to discuss your combination. Dual valve cover bolt pattern is standard.
The exhaust ports are raised .250" over a standard GM L-98 cylinder head.

ALL AFR 245cc Competition series available, part numbers 1137 1138

2.125 valves will require aftermarket pistons notched for valve clearance.

Basic Package Components Part #
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 3-angle Radiused Valve Job

Bead Lock Intake Valve, 2.125" x 100L
AFR #7253
Bead Lock Exhaust Valve, 1.600" x 100L AFR #7254
1.550" OD Dual Solid Roller Valve Spring w/ dampener,
AFR #8001
250 lbs on seat, .800" maximum lift
Pacaloy #1225
10° 4140 Chrome Moly Retainers AFR #8511
10° Bead Lock Valve Keepers AFR #9009
7/16" Rocker Studs AFR #6405
Guide Plates AFR #6105
Viton Valve Seals AFR #6612
Hardened Spring Seat
AFR #8045
Intake Vavle Seats AFR #9060
Exhaust Vavle Seats AFR #9070
Bronze Valve Guides AFR #9051

Specifications, Features, and Optional Supporting Components
Head Torque 65-70 ft. lbs.
Rocker Stud Torque 55-60 ft. lbs
Intake Port Gasket, 1.310" X 2.180" w/ 3/8" radius Fel-Pro #1206, AFR #6820
Exhaust Port Gasket Fel-Pro #1405, AFR #6835
Head Gasket 350 cid
Fel-Pro #1004, AFR #6801
Head Gasket 400 cid
Fel-Pro #1014, AFR #6802
SB Chevy Head Bolt Kit
ARP #134-3701 AFR #6310
SB Chevy Head Stud Kit, 12 Point Nuts ARP #234-4301 AFR #6305
Head Bolt Washers, Manley
AFR #6320
Suggested Manifold, Super Victor
AFR #5033
Spark Plug Starting Range Autolite 3910
Combustion Chambers 70cc or 80cc
Spring Pocket Can be cut to 1.680, no deeper
Valve Spacing 60 / 40
Rocker Arms Shaft Mount ONLY
Valve Angle 23°
Angle Mill (Milling options available) .008" per cc
Flat Mill (Milling options available) .006" per cc
Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers. Angle mills might require .120 thick instake gasket.


Shipping Information

  • Item Requires Shipping
  • 65.0 lbs.
  • W12.0000” x H12.0000” x L24.0000”
  • Free Shipping!
  • This item ships in its own box.
  • FREE continental USA ground shipping on ALL AFR Cylinder Heads