10 Best 243 Heads Reviewed - Updated May 2024

Reviews Scanned

Sale1

GM LS2 LS6 Gen III Gen IV SET OF 2 Remanufactured Cylinder Heads 243 Assembly w/Rocker Arms OEM REMANUFACTURED (Renewed)

Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity
New valve seats installed as necessary
New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary.
Valve job Performed with all required angles & vacuum tested seals to ensure perfect compression.
All necessary parts are cleaned and inspected before final assembly to meet AERA specifications

Remanufactured Chevy Silverado Vortec GMC Sierra Cylinder Heads PAIR LS6 LS2 Cast# 799/243 (CORE RETURN REQUIRED)

- Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity
- Valve job Performed with all required angles & vacuum tested to ensure perfect compression.
- PCD milled to ensure a super smooth finish. (PCD stands for Polycrystalline Diamond, and is best for aluminum heads).
- New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary.
- New valve seats installed as necessary

BTR LS1 Shaft Rocker Kit 4.8 5.3 5.7 6.0 LS1 LS2 LS3 LQ4 LQ9 Brian Tooley (With BoltsLS1, LS2, LS3)

BTR Brian Tooley LS1 SHAFT ROCKER KIT V2 Fits 1997-2013 Cathedral Port LS Heads 4.8L 5.3L 5.7L 6.0L LS1 LS2 LM7 L33 LQ4 LQ9 Compatible with OEM Casting #'s 243, 241, 799, 853, 706, 862, 317 Fits Trick Flow Cathedral port heads. May fit other aftermarket heads, please verify first.
Introducing the new BTR Shaft Rocker Kit The Next Step in the Evolution of LS Rocker Arm Trunnion Kits Performance-minded engine builders know there is an inherent issue with valve train deflection when using stock rocker arm mounting in LS Gen III-IV-cylinder heads.
The new BTR shaft rocker system significantly reduces that deflection thereby improving performance and durability. This kit features technology typically only found in high-end shaft rocker systems. The shaft rocker system consists of a billet steel stand equipped with four shafts per cylinder head, fasteners and bearings. The shafts are made from genuine 52100 bearing steel.
Each pair of rockers has five fasteners mounting them to the rocker stand compared to the traditional single bolt per rocker configuration. During the development of this system, both aluminum and steel stands were tested - steel reigned supreme. The new BTR shaft rocker kit is ready for assembly using your existing stock rockers. This updated V2 version of the shaft rocker kit features a shim design for easier assembly compared to snap rings and higher strength.
Stock Rocker arm bolts can be reused, or choose to have new BTR Rocker Arm Bolts Included.

Sale4

GM LS2 LS6 Gen III Gen IV Cylinder Head 799 Assembly w/Rocker Arms OEM

Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity
New valve seats installed as necessary
New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary.
Valve job Performed with all required angles & vacuum tested seals to ensure perfect compression.
All necessary parts are cleaned and inspected before final assembly to meet AERA specifications

Htostar Racing For LS Intake ManifoldCompatible with LS1 LS2 LS6 of cathedral port heads with Drive by Cable Throttle Body Compatible with Chevy Cadillac Pontiac Aluminum (92mm)

[Applicable Engine] Compatible with LS based engines with cathedral port heads shape; Compatible with 4.8L 5.3L LS1 LS2 LS6 original engine. For LS 4 bolt throttle body with cable drive only, not for drive by wire.
[Some Models] Compatible with Chevy Corvette 97-07 | Corvette Z06 01-04 | SSR 05-06 | TrailBlazer SS 06-09 | Cadillac CTS V-series 04-07 | Pontiac Firebird Formula Trans AM 98-02 | Pontiac GTO 05-06 | Saab 9-7X Aero 08-09.
[Size] 92mm/3.62" inlet with 210mm height (taller); 1/8" thick aluminum; vacuum ports (1/4NPT & 1/8NPT) with plug; rear M12 x 1.25 MAP port for 10 MAP.
[Throttle Body] Drive by cable, Idle air control (IAC) and throttle position sensor (TPS) installed. Flow Rate: 1218 CFM, Working pressure: 85 PSI, Burst pressure: 245 PSI.
[Note] Fit for original factory fuel injectors, but different spacers may be required.

Michigan Motorsports 2.000" Stainless High Performance LS Intake Valves - Set of 8 for Cathedral Port 243 799 317 241 853 806 Heads LS1 LS2 LS6 LQ4 LQ9 LC9 LMG

Michigan Motorsports 2.000" Stainless High Performance LS Intake Valves Set of 8
Fits 1997-2013 Cathedral Port LS Heads EXCEPT 706 and 862 Castings
Compatible with Casting Numbers 243 799 317 241 853 806
Michigan Motorsports' stainless valves are a great upgrade for your factory LS cylinder heads. Made from high strength 21-4N Stainless Alloy, these one-piece forgings feature hard chrome plated stems and hardened tips for durability. Undercut stems and swirl polishing improve flow over the OEM GM valves and standard aftermarket replacements. These valves are designed to be a direct drop-in replacement for the factory 2.000" intake valves on the applications listed below.
Fits Engine Codes: LS1 LS6 LS2 LQ4 LQ9 LS4 LY2 L20 LY5 LMG LMF LH6 LC9 LH8 LH9 L33

Michigan Motorsports 1.550" Stainless High Performance LS Exhaust Valves - Set of 8 for Cathedral Port 243 799 706 862 317 241 853 806 Heads LS1 LS2 LS6 LQ4 LQ9 LC9 LMG LM7

Michigan Motorsports 1.550" Stainless High Performance LS Intake Valves Set of 8
Fits 1997-2013 Cathedral Port LS Heads EXCEPT 706 and 862 Castings
Fits Casting Numbers 243 799 706 862 317 241 853 806
Michigan Motorsports' stainless valves are a great upgrade for your factory LS cylinder heads. Made from high strength 21-4N Stainless Alloy, these one-piece forgings feature hard chrome plated stems and hardened tips for durability. Swirl polishing improves flow over the OEM GM valves and standard aftermarket replacements. These valves are designed to be a direct drop-in replacement for the factory 1.55" exhaust valves on the applications listed above and below.
Fits Engine Codes: LS1 LS6 LS2 LQ4 LQ9 LS4 LY2 L20 LY5 LMG LMF LH6 LC9 LH8 LH9 LR4 LM7 L59 LM7 L33

COMP Cams 4974 Pro Head CC Kit

Buret scales marked in .2cc increments
Compatible with virtually any liquid needing measured
Kit includes 100cc precision glass buret, stand and clamp assembly, plexiglass sealing plate and instructions
Part number: 4974

BTR Black Equalizer 1 Intake Manifold Cathedral Head Brian Tooley IMA-01 LS1 LS2 LS6 4.8 5.3 5.7 6.0 (Black Intake, Fuel Rails and Lokar Coil Bracket)

BTR Limited Edition Black Equalizer 1 Intake Manifold, Billet Fuel Rail Kit, Throttle Cable Bracket For Cathedral Port Head Applications
Intake, Fuel Rails, Lokar Cable Bracket The First In a Series Of Low Profile, High Performing Cast Intakes! Cast from 319 Aluminum Made in USA
O-Ringed port openings and Lid surface Easy Insert Steep Chamfer Injector Bores for trouble free Injector o-ring insertion 6000-8000+ Ideal operating range(for sub 4 inch stroke applications) Underslung Plenum design for Maximum Hood Clearance
102mm Profiled Throttle Bore 1 map sensor location in rear with 2 additional user optional locations Additional User defined LS3 and LS1, LS2, LS6 map sensor bores ISO9001:2015 Certified Machining
2 piece design for easy porting access Lightweight CAD generated design Profiled Port Openings for Optimum Out of The Box Performance All threads are roll form aircraft standard DSDV Clears F-Body Cowls Clears C5 Cowls with minimal massaging to intake Not compatible with truck accessories

PUZZLEDEER Intake Manifold for LS Cathedral Port Heads for LS1 LS2 LS6 LS Intake Manifold Engines for Chevy 4.8 5.3 5.7 6.0 Silver 92MM ls intake manifold

🥇【UPPER INTAKE MANIFOLD】The intake manifold is responsible for distributing air to each cylinder of the car. It is attached to the cylinder head, and as air enters the system, the intake manifold distributes it evenly to each cylinder. The intake manifold also helps to cool the cylinder to prevent the engine from overheating.
🥇【FITMENT TYPE】Intake manifold assembly fit for Chevy Corvette 97-04, for Pontiac Firebird Formula, for Trans AM 98-02, for Corvette Z06 01-04, for Cadillac CTS V-series 04-05, for Chevrolet Corvette 05-07,for Chevrolet SSR 05-06, for Chevrolet TrailBlazer SS 06-09, for Cadillac CTS V-Series 06-07, for Pontiac GTO 05-06, for Saab 9-7X for Aero 08-09
🥇【SMOOTHINNER WALL】The smooth inner wall of the intake manifold can reduce the gas flow resistance and improve the intake capacity.
🥇【ENSURE FIT】make sure this manifold modified parts fits your exact vehicle, input your make, model and trim level into the Amazon Garage.Package Includes: 102mm Intake manifold (with rear map sensor port), gaskets, hardware, fuel rails, fuel crossover line. (Injector and throttle body not included)
🥇【TIME TO REPLACE】If you find that your vehicle is unresponsive to the throttle or has a rough idle speed, this may be an indication of a leak in the intake manifold. You should replace the faulty manifold as soon as possible to prevent further damage to your car's engine.

Our Promise to You

We receive a lot of questions about what products we recommend, especially the products on this page. Questions like:

What is the best 243 Heads for 2022??
What is the best 243 Heads?to buy?
What is the best 243 Heads to buy on the market?
or even What is the most affordable (most budget friendly, cheapest or even most expensive!!!) 243 Heads??

All of these above questions make purchase decisions difficult. We know the feeling because we used to be in this weird situation when searching for these items.

Before deciding to buy anything, make sure you research and read the reviews from trusted sources.?Luckily, we use incredibly smart and complicated AI to help find great products. We use our own custom algorithms to generate lists of the best brands and give them our own approval rating to rank from 1st to 10th.

You can see the 243 Heads of above. This list is updated regularly, so you can be sure that the information provided is up-to-date.

You may?read more about us?to learn how we support this site. Don?t hesitate to?contact us if something is incorrect or provides misleading information.