66-406-K SBT Block Gp Core Xlt 800 Yamaha

Review SBT New Short Block For Yamaha Gp/xl/xlt No Core Required for YAMAHA XLT 800

The SBT 66-406-K block is a crucial component for Yamaha 800 GP, XL, and XLT model owners with the 66E-W0090-00-8P core. This high-performance watercraft engine block is designed to deliver power, efficiency, and reliability for an unforgettable riding experience.

This SBT engine block is crafted using advanced materials and manufacturing techniques to ensure optimal engine performance. It features a durable, closed-deck design that minimizes water penetration, reducing the risk of corrosion and wear. The block also boasts a precise, machined cylinder bore surface that ensures a perfect seal with the piston rings for improved combustion efficiency.

The SBT 66-406-K block is also designed with a high-flow, water jacketing system that efficiently cools the engine, even during the most demanding riding conditions. This ensures consistent power output and prolongs the life of the engine.

Another notable feature of this engine block is its precision-machined crankshaft and camshaft bearing surfaces, which provide a smooth, reliable power transfer and reduce the risk of engine damage. The block also includes upgraded, high-performance pistons and rings that improve combustion efficiency and reduce engine wear.

This SBT engine block is engineered to meet or exceed OEM specifications and is backed by a comprehensive warranty, ensuring peace of mind for Yamaha 800 GP, XL, and XLT model owners. By choosing the SBT 66-406-K block, you're investing in a high-quality, reliable engine component that will help maximize the performance and longevity of your Yamaha watercraft.

The SBT 66-406-K block is a performance intake manifold designed for Yamaha WaveRunner 800 GP/xl/xlt models with hull numbers starting from 66E-W0090-00-8P. This manifold is known for its ability to improve engine performance by optimizing air/fuel mixture delivery. Here are some pros and cons of buying this intake manifold:

1. Improved Performance: The SBT 66-406-K intake manifold is designed to improve engine performance by optimizing the air/fuel mixture delivery to the engine cylinders. This results in better throttle response, increased top-end speed, and improved overall power output.

2. High-Quality Construction: This intake manifold is made from high-quality materials, including billet aluminum and stainless steel components. This ensures durability and longevity, making it a worthwhile investment for serious PWC enthusiasts.

3. Easy Installation: The intake manifold is relatively easy to install, with most users reporting that it can be done in about an hour or two. This is a significant time-saver compared to other performance upgrades.

1. Cost: The SBT 66-406-K intake manifold is not an inexpensive upgrade, with a retail price of around $1,500. This may be a significant investment for some PWC owners, particularly those on a tight budget.

2. Compatibility: This intake manifold is only compatible with Yamaha 800 GP/xl/xlt models with hull numbers starting from 66E-W0090-00-8P. This limits its appeal to a specific group of PWC owners.

3. Loud Operation: Some users have reported that the intake manifold produces a louder engine sound compared to the stock manifold. This may be a concern for those who prefer a quieter riding experience.

In conclusion, the SBT 66-406-K intake manifold is a high-performance upgrade that can significantly improve the power output and overall performance of Yamaha 800 GP/xl/xlt models. Its high-quality construction, easy installation, and improved performance make it a worthwhile investment for serious PWC enthusiasts. However, its cost and limited compatibility may be a concern for some users. Ultimately, the decision to purchase this intake manifold will depend on your personal preferences, riding style, and budget. If you are looking for a significant performance upgrade and are willing to invest in it, then the SBT 66-406-K intake manifold is a solid choice.

Details:

Includes all new:: engine crankcase. Rods and wrist-pin bearings. Pistons rings. Fitment: 1998 gp8 1999 2000 xl8 2001 2002 Xlt8 2003 2004 2005 gp800.

New Sbt short block for Yamaha 800 gp/xl/xlt - 66E-W0090-00-8P no core required: details: new brand for 800pv motor: motor. Head cover gasket. Assembled through the cylinders and comes with all new internals Sbt castings. Cast aluminum body paint it any color you choose.

Power valve system to the pulley. Warranty: Sbt warrants that the product shall be merchantable and free from defects in materials workmanship.

specifications watercraftimp:

• for models: Xlt, 800
• for makes: Yamaha
• brand: Sbt
• mpn: 66-406-k
• part type: Block

returns watercraftimp:

• paid by: seller
• policy: returns accepted
• time: 60 days

offer watercraftimp:

• in stock #: 5
• options: ship-to-home
• prices: $149.86–$995.00
• item condition:
  • New
  • Used
• sold #: 10
• started: february 14, 2026
• availability: in stock

payments watercraftimp:

• credit card: diners-club
• other
• wallet: apple-pay

shipping watercraftimp:

• type: fixed
• class: standard
• service: standard
• transit: 4-6 days

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

seller watercraftimp:

• rating: 100.0%
• city: clearwater, fl
• # reviews: 33659