K-Tuned Upper Coolant Housing With 16AN and Hose End Fitting Redesign

K-Tuned's redesigned upper coolant housing transforms how you manage coolant flow on your K-series engine, featuring integrated 16AN and hose end fittings that make plumbing faster and cleaner than ever. The engineering here is solid—you get the critical 1/8" NPT temperature sensor port and recirculation fitting built in, all sealed with reliable o-rings to eliminate weeping issues that plague stock setups. What really sets this apart is the modular design that lets you swap between a standard filler neck and direct fittings without breaking down your whole system, and the dual-position locking pin on the filler neck adapts to both stock and lean engine configurations.

Installation is straightforward with all mounting hardware and port plugs included, making this a bolt-on upgrade that saves you from fabricating custom solutions. The threaded port design with o-ring sealing means you're not fighting plastic clips or fragile snap-fits—this is built for reliability whether you're street driving or tracking your K20A, K20A2, K20A3, K20Z1, or K24A1 head.

If you're running a K-series build and want to eliminate cooling system headaches while gaining flexibility in your hose routing, this is the housing that does it right.