FACTORY SPEC Cylinder Heads 4.8 5.3 706

( Brand: Factory Spec ), ( Part Type: Cylinder Head ), ( Country/region Of Manufacture: United States ), ( Oe Spec Or Performance/custom: Oe Spec )

Review FACTORY SPEC Rebuilt Chevy Gmc 4.8 5.3 Cylinder Heads Gen 706 Casting fits 1999–2007

Introducing the Gen 706 Cylinder Heads for 99-07 Chevy GMC 4.8L and 5.3L engines, a high-performance upgrade that is designed to maximize horsepower and torque while maintaining the reliability and durability that you've come to expect from these vehicles.

These cylinder heads are constructed from premium A356 aluminum alloy, ensuring optimal heat dissipation and durability. The Gen 706 heads feature a 2.02/1.59 valve size, which allows for increased airflow and combustion, resulting in improved engine performance. The heads also feature a 64cc combustion chamber, which provides a larger fuel-air charge, further enhancing power output.

The Gen 706 heads are equipped with 2-piece valve guide seals, which provide a tighter seal between the valve guides and the cylinder head, reducing the risk of oil leakage and improving engine efficiency. The heads also feature fully CNC-machined ports, which provide a precise and consistent flow of air and fuel to the combustion chamber, further improving engine performance.

The Gen 706 cylinder heads are also designed to work seamlessly with aftermarket camshafts, providing even more performance potential for those looking to take their engine to the next level. The heads are also compatible with stock and aftermarket intake and exhaust systems, making them a versatile upgrade option for a wide range of 99-07 Chevy GMC vehicles.

In summary, the Gen 706 Cylinder Heads for 99-07 Chevy GMC 4.8L and 5.3L engines are a high-performance upgrade that is designed to maximize horsepower and torque while maintaining the reliability and durability that you've come to expect from these vehicles. With features such as a premium A356 aluminum alloy construction, a 2.02/1.59 valve size, a 64cc combustion chamber, 2-piece valve guide seals, and fully CNC-machined ports, these heads provide a significant performance boost for your engine. Whether you're looking to take your daily driver to the next level or prepare your vehicle for competition, the Gen 706 Cylinder Heads are a smart investment.

1. Compatibility: These cylinder heads are compatible with various 99-07 Chevy and GMC vehicles with 4.8L and 5.3L engines, making them a versatile option for many car owners.

2. Durability: Gen 706 cylinder heads are known for their robust construction and long-lasting performance, making them a reliable choice for replacing worn-out or damaged cylinder heads.

3. Improved performance: Upgrading to Gen 706 cylinder heads can result in improved engine performance, including increased horsepower and torque.

4. Affordability: Compared to some aftermarket cylinder head options, Gen 706 cylinder heads are relatively affordable, making them an accessible upgrade for many car owners.

1. Limited availability: Gen 706 cylinder heads may not be readily available in all areas, which could result in longer wait times or higher shipping costs.

2. Potential compatibility issues: While Gen 706 cylinder heads are compatible with many 99-07 Chevy and GMC vehicles, it's essential to double-check that they will fit your specific make and model.

3. Installation complexity: Replacing cylinder heads can be a complex and time-consuming process, requiring specialized tools and expertise.

4. Potential performance gains may not be noticeable: Depending on the overall condition of your engine and the specific modifications you have made, the performance gains from upgrading to Gen 706 cylinder heads may not be significant.

Gen 706 cylinder heads can be a cost-effective and reliable upgrade for 99-07 Chevy and GMC vehicles with 4.8L and 5.3L engines. They offer improved performance and durability, but the installation process can be complex, and potential compatibility issues should be considered. If you're comfortable with the installation process and believe the performance gains will be worth the investment, Gen 706 cylinder heads could be a valuable upgrade for your vehicle. However, it's always a good idea to research thoroughly and consult with a professional mechanic before making a purchase.

Details:

Completely rebuilt set of two heads ready to bolt on. The pics are of actual heads. No file photos. No core required.

• $459.99-$574.99

specifications rockeareng:

• for makes: Chevy, Gmc
• for years: 1999-2007
• brand: Factory Spec
• part type: Cylinder Head
• country/region of manufacture: United States
• oe spec or performance/custom: Oe Spec

Offer rockeareng:

• quantity: 1
• Sold: 0
• best offer: false
• bids: 0
• Started: February 24, 2017, 12:01 pm

Payments rockeareng:

• MOCC
• PayPal

Seller rockeareng:

• zipcode: 67601
• city: Hays, Kansas

Ratings:

1. as described, packaged good, super fast shipping, 02-16-17
2. excellent thanks again 02-14-17
3. asset to thanks 02-14-17
4. 5 stars 02-16-17
5. Quick response and fast payment. Perfect! THANKS!! 02-09-17

Shipping rockeareng:

• type: Calculated
• handling: 3 days

Returns rockeareng:

• policy: no returns

General rockeareng:

• in stock: Yes
• condition: Remanufactured
• motors > partsaccessories > cartruck parts > enginescomponents > rocker armsparts engines components

Factory Spec Is Similar To:

• 13257-53j03 Factory Spec Jdm Nissan (45.1% similar) The item pictured is exact one to be received. Know exactly what you are buying on. One rocker I would suggest replacing as it has a indentation believe from the lifter bouncing away camshaft. The condition of each item is described on listing for. JD Nissan Silvia S13 S14 S15 SR20DET rocker arm set...(September 21st, 2017)
• Chevrolet 396 375hp 427 425hp 435hp 16 Gm Bbc Inch L Rocker Arms Big Block Chevy 402 454 Spec Hi Perf L78 L88 (24.8% similar) The manufacturer part number indicates the high-quality, long slot design of these rocker arms, making them a valuable addition to any performance automotive setup. They are vintage parts with a strong performance element, suitable for enthusiasts looking to enhance the valve train components of ...(December 18th, 2025)