BK Racing F23 Transmission Cap AN-4 Adapter – Clean Vent & Breather

Upgrade your Getrag F23 transmission with the BK Racing Transmission Cap AN-4 Adapter — the best AN-4 vent cap for F23 manual transmissions, providing a secure, leak-free AN-4 male connection for custom breather lines, catch cans, or vent-to-atmosphere setups. This precision-machined adapter replaces the factory plastic vent cap, allowing easy routing of braided hose for improved crankcase ventilation in high-performance or race applications — trusted for Cobalt, Cavalier, HHR, Ion, Solstice, and F23-swapped Ecotec builds.

CNC-crafted from billet aluminum with black anodized finish, this adapter ensures durable sealing while supporting high-flow venting to prevent pressure buildup and oil leaks during hard launches or track use.

Key Features:

• AN-4 male flare for direct braided hose connection
• Billet aluminum construction with O-ring seal for leak-free performance
• Direct replacement for factory F23 vent cap
• Knurled edge for easy hand installation/removal

Performance Benefits:

• Cleaner crankcase venting for reduced pressure and oil blow-by
• Supports remote catch can or filtered breather setups
• Prevents common factory cap failures or leaks in modified transmissions
• Improves transmission longevity in high-power or track applications
• Pairs perfectly with BK Racing F23 traction blocks, seals, and drivetrain mounts

Compatibility:

• Getrag F23 5-speed manual transmissions
• GM Ecotec-powered vehicles:
  • Chevrolet Cobalt (base models), Cavalier, HHR
  • Pontiac Sunfire, G5, Solstice (non-GXP)
  • Saturn Ion (non-Redline), Vue
  • Custom F23 swaps and related platforms

Important Notes:

• AN-4 hose and fittings sold separately
• Route vent line away from heat/exhaust for best results
• Off-road and competition use only

Installation Note: Hand-tighten until O-ring seats. No tools needed for normal use. Professional routing recommended for vent lines.

Proudly engineered by BK Racing Inc. — transmission specialists providing reliable venting solutions for maximum performance and durability.

Vent smarter — add the BK Racing F23 Transmission Cap AN-4 Adapter to your build today!

Enhanced Functionality with AN-4 Adapter

The BK Racing F23 Transmission Cap AN-4 Adapter is designed for those seeking to improve their vehicle's performance. This adapter not only provides a clean vent but also acts as a breather, ensuring that your transmission remains at optimal pressure. With this innovative design, you'll notice a significant reduction in oil leaks and pressure loss, making it an essential upgrade for any serious racer or car enthusiast.

Quality Build for Durability

Quality is paramount in automotive components, and the BK Racing F23 Transmission Cap reflects that commitment. Constructed from high-grade materials, this adapter is made to withstand the rigorous conditions of motorsport and daily driving. Its sturdy design means that you won't have to worry about frequent replacements, thereby saving you time and money in the long run.

Easy Installation and Compatibility

One of the highlights of the BK Racing F23 Adapter is its user-friendly installation process. You won't need specialized tools or extensive mechanical knowledge, making it accessible for DIY enthusiasts. Moreover, this adapter is compatible with a wide range of vehicles, which means you can easily enhance your car's performance without extensive modifications. Therefore, it's a smart choice for both beginners and experienced automotive enthusiasts.