TracTuff OEM Angle Water Neck for 06-11 Civic Si/04-08 TSX

TracTuff OEM Angle Water Neck for 06-11 Civic Si/04-08 TSX/K Swaps

Upgrade your cooling system with the TracTuff OEM Angle Water Neck — a solution designed for the 2006–2011 Honda Civic Si and 2004–2008 Acura TSX. Compatible with popular K-series engines including the K24A, K24A2, K24A4, K24A8, K20Z3, and K20Z4, this billet aluminum water neck offers a cleaner, stronger, and more efficient alternative to the bulky OEM unit. Designed to provide a cleaner look when using these engines in K Swap chassis, such as the EG Civic or DC Integra. 

The TracTuff OEM Angle Water Neck starts with a beautifully CNC-machined 6061-T6 aluminum flange that incorporates the largest possible outlet port within the OEM gasket footprint for optimal flow. A 1.25-inch angled tube replicates the OEM outlet position, while a 1/2-inch NPT heater port comes standard to maintain flexibility for various setups — whether you choose to run a heater core or cap it off. The design eliminates the unnecessary EGR and bulky fittings found on factory parts, giving your engine bay a cleaner, more performance-oriented look.

Each TracTuff water neck includes a complete hardware kit with four M8 socket head bolts, a 90° heater hose fitting, a 1/2-inch NPT plug, and two o-rings for a secure and leak-free installation. The outlet tube is precision-welded to sit level, ensuring consistent fitment and reliable coolant routing even under demanding performance conditions.

Key Features

• Direct replacement for OEM upper water neck on K-series engines
• Constructed from durable 6061-T6 billet aluminum
• 1.25-inch angled outlet mimics factory hose alignment
• Includes 1/2-inch NPT heater port for heater hose or optional plug
• Eliminates EGR and bulky OEM fittings for a cleaner installation
• Complete hardware kit included for easy installation
• Compatible with multiple K-series engines and Honda/Acura applications

Compatibility

• 2006–2011 Honda Civic Si (K20Z3)
• 2004–2008 Acura TSX (K24A2)
• 2006–2011 Honda Civic Type R (K20Z4)
• 2003–2007 Honda Accord (K24A4 / K24A8)
• 2003–2011 Honda Element (K24A4 / K24A8)

Whether you’re refreshing your cooling system or optimizing your K-swap setup, the TracTuff OEM Angle Water Neck provides the perfect combination of form, function, and reliability — all while improving flow and simplifying your engine bay layout.