S3 PARTS XTR-1208-300-U Extreme Cylinder Head Kit

( Brand: S3 Parts ), ( Manufacturer Part Number: XTR-1208-300-U ), ( Type: Cylinder Head ), ( Machine Type: Off-road Motorcycle ), ( Country/region Of Manufacture: Spain ), ( Finish: Anodized )

Review S3 PARTS Extreme Cylinder Head Kit Blue fits ENDURO

Introducing the S3 XTR-1208-300-U Enduro Extreme Cylinder Head Kit, a high-performance upgrade for your engine that's designed to deliver increased power, improved thermal efficiency, and enhanced durability. This cylinder head kit is specifically engineered for off-road and high-performance applications, making it an excellent choice for those seeking to push their vehicle to the limit.

The S3 XTR-1208-300-U Cylinder Head Kit comes with eight new cylinder heads, each featuring a large 300cc intake port and a high-flow exhaust port. The large intake ports provide more airflow to the engine, leading to increased power output. The high-flow exhaust ports, on the other hand, help reduce backpressure and improve engine breathing, resulting in better power and torque throughout the RPM range.

The cylinder heads also come with a revised combustion chamber design that improves combustion efficiency and reduces emissions. The new design allows for a more complete combustion process, resulting in a cleaner burning engine and improved fuel economy.

The S3 XTR-1208-300-U Cylinder Head Kit is made from high-strength aluminum alloy, ensuring that it can withstand the rigors of off-road use. The heads also come with reinforced valve seats and thicker valve guides, providing enhanced durability and reducing the risk of valve seat recession and guide wear.

The kit includes all necessary hardware, including new valves, springs, and retainers, making it a complete solution for upgrading your engine's cylinder heads. The included valves feature a large diameter and are made from high-strength material, allowing for increased flow and improved engine performance. The springs are designed to provide the proper valve lift for optimal engine operation, while the retainers ensure secure valve positioning.

In conclusion, the S3 XTR-1208-300-U Enduro Extreme Cylinder Head Kit is a top-tier upgrade for those seeking to maximize the performance of their engine. With its large intake and exhaust ports, revised combustion chamber design, and high-strength construction, this cylinder head kit delivers increased power, improved thermal efficiency, and enhanced durability, making it an essential addition for any high-performance or off-road application.

The S3 XTR-1208-300-U Enduro Extreme Cylinder Head Kit is a performance upgrade for certain Honda engines, specifically those found in the CRF450R and CRF450X motorcycles. This kit offers several improvements, but it also comes with some considerations. Here are the pros and cons of buying this product.

1. Increased Power: The Enduro Extreme Cylinder Head Kit is designed to provide more power and torque, making your motorcycle more responsive and faster.

2. Improved Thermal Efficiency: The kit includes a new combustion chamber design and larger intake and exhaust ports, which can help improve thermal efficiency and reduce engine heat.

3. Enhanced Durability: The kit uses high-performance materials, such as titanium retainers and stainless steel valves, which can help increase the longevity of the engine.

4. Adjustable Camshafts: The kit includes adjustable camshafts, allowing riders to fine-tune the engine for their specific riding style and conditions.

1. Cost: The Enduro Extreme Cylinder Head Kit is a premium upgrade, and it comes with a premium price tag.

2. Installation Complexity: Installing this kit requires a fair amount of mechanical knowledge and experience, and it can be a time-consuming process.

3. Possible Engine Noise: Some riders have reported that this kit can make the engine louder, which may not be desirable for all riders.

4. Potential Compatibility Issues: This kit is designed for specific Honda engines, and it may not be compatible with other makes or models.

In conclusion, the S3 XTR-1208-300-U Enduro Extreme Cylinder Head Kit is an excellent performance upgrade for riders who want more power, improved thermal efficiency, and enhanced durability from their Honda CRF450R or CRF450X motorcycle. However, it comes with a high price tag, a complex installation process, and the potential for more engine noise. Ultimately, whether or not this kit is right for you depends on your riding style, budget, and mechanical expertise.

If you are an experienced rider with a good mechanical background, who values performance and is willing to invest time and money into upgrading your motorcycle, then the Enduro Extreme Cylinder Head Kit is a worthwhile investment. However, if you are a casual rider or are not comfortable with the installation process, then this kit may be more trouble than it's worth. In that case, it's best to stick with the stock engine and enjoy your motorcycle as it is.

Details:

Elevate your motorcycles performance with the S3 XTR-1208-300-U Enduro Extreme Cylinder Head Kit, a testament to durability and power. The anodized finish not only enhances the visual appeal but also provides a robust protective layer, making it practical choice for riders who demand both aesthetics and functionality.Manufactured in Spain, cylinder head kit is prime example of precision engineering craftsmanship. Crafted by S3 parts, this kit is designed to withstand the rigors of extreme riding conditions, offering a level reliability that unmatched. With its OE/OEM part number XTR-1208-300-U, compatibility is seamless, ensuring a direct fit for your motorcycle.

This allows for an easy installation process, getting you back on the track or road in no time with peace of mind that comes a quality-made component.

part #: xtr1208300 prices

• $165.64-$175.23

specifications cylindermotorcycleiz:

• for models: Enduro
• brand: S3 Parts
• mpn: Xtr-1208-300-u
• type: Cylinder Head
• machine type: Off-road Motorcycle
• country/region of manufacture: Spain
• finish: Anodized

returns cylindermotorcycleiz:

• policy: No Returns

seller cylindermotorcycleiz:

• rating: 100.0%
• # reviews: 19
• city: Bozeman, Montana

shipping cylindermotorcycleiz:

• class: Standard
• type: Fixed
• service: USPS Ground Advantage
• carrier: USPS
• cost: $5.99
• transit: 5-11 Days

offer cylindermotorcycleiz:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• started: May 9, 2025

general cylindermotorcycleiz:

• condition: Used
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

payments cylindermotorcycleiz:

• credit card: Mastercard
• wallet: Paypal
• other

S3 Parts XTR-1208-300 Is Similar To:

• 16826-98y S3t X1 Fin Front 16797-98y M2 Buell Cylinder Used S3 S1 Head Broken (42% similar) Check the shipping cost and ask any questions before buying. Casting number 98Y. Part number 98Y. This head has not been run and was only installed and then removed. The tech dropped it and it broke off a piece of one of the fins. It should be easy enough to epoxy the broken piece of the fin back on...(January 26th, 2015)
• Https -s3.us-east-2.amazonaws.com-motortests-aa Video.mp4 Not Specified Kawasaki Valve Cover Case Cylinder Oil Cap Head (26.5% similar) 15 years on and 24,000 sales. Will give you five 5 choices of why are contacting me as seen directly below. Selecting the other choices can cause to penalize our defect score. Every person makes mistakes the difference is how mistake handled. 4 I received an item that wan't as described. Buying on ...(May 7th, 2018)
• Stk-hus-300 Stars Head S3 Engine (38.7% similar) Its new design has thicker walls and higher water flow to ensure a better cooling rate. Noticeable at a distance and stunning close view. 5 o-rings: top cylinder INSERTS6 crupper washers for m8 head BOLTS3 engine. Star head cylinder heads: forged in the best aluminum alloy to obtain a top quality ...(July 18th, 2017)
• Slavens S3 Mule High Compression Cylinder Head Insert St-k-in-416-aa Ktm 300 Tpi (35.5% similar) Fits in the slaves S3 head. Race gas not required. Fits the S3 head made for the below bikes 18-22 KTM 250/300 XCW/EXC/6D/ 20-22 XC tip. New condition...(August 2nd, 2022)
• S3 Power Hi Comp Billet Head 2021 22 Ec 300 Enduros (33.9% similar) Gas gas 12021-2022 EC XC 300. S3 stars power cylinder head kit. Made from the highest quality billet aluminum. Power kit engine manufactured by KTM. New condition...(August 14th, 2022)
• S3 Exreme Billet Head Black Gasgas Ec Xc 250 1999-2016 (34.8% similar) Gas gas 1999 -2016 EC XC 300. Made from the highest quality billet aluminum. New condition...(September 16th, 2022)
• Kawasaki 92015-020 Cylinder Head Bolts Engine Motor Nut Cap 8mm H1 500 S3 400 Kh A1 Kd Ke (36% similar) These fit 46 different model's. Part # 92015-020 for reference. Set of 12 used head bolts removed from a Kawasaki h1 500. Decent shape...(November 23rd, 2023)
• S3 Group S3-0985 Cylinder Head-ktm (44.2% similar) Used only for a couple hours on 2017 KTM 300XC...(July 15th, 2025)
• Harley-davidson 16826-98 98 Buell Front Cylinder Head Black For Parts 1x1 M2 S3 (35.7% similar) Removed from: 1999 Bell model with unknown miles, please review all pictures to assess the condition of item. Every effort has been made to accurately depict and describe the condition of this part. 98 Bell 16826-98 front cylinder head black for Parts 1X1 m2 S3, this cylinder head has damage and ...(August 4th, 2025)
• Buell 16703-96ya 1997-1999 Thunderbolt S3 Black Front Rear Engine Cylinder Heads With Valves (37.9% similar) There is some wear, discoloration, pitting, and scratches in the material as pictured. Bell, cylinder heads. Manufacturer: Bell. Fits model's: thunderbolt S3: 1997 , 1998 , 1999 . Condition: used. It is a little dirty and has some marks from previous use storage. Condition: this is a used front ...(September 12th, 2025)
• S3 Group Stk-b-300rr Beta 300 Rr 18 19 And X Trainer 13-17 Billet Interchangeable Dome Head (32.9% similar) Be smart, listen to your motor. The black AA dome is considered much higher compression than stock and designed for 6000' to 12,000' feet of elevation riding. Be careful with you fuel. It may fit other model's. If you hear it pinging just don't keep thrashing. This kit is new older stock for us. The...(November 7th, 2025)