k24z coolant port adapter trac tuff
r20 K24Z coolant adapter

Tractuff R40 head coolant adapter – K24Z


Our K24AZ7 water bypass adapter allows R40 cylinder head owners to run the more popular aftermarket intake manifold options that were designed for the early PRB/ PRC flange. The PRB/ PRC style manifolds do not have an integrated coolant passage so the coolant bypass hole is left open when used together.

Even if you don’t plan on running a PRB/ PRC style manifold… there are plenty of benefits that make this product a must have! The biggest benefit is in the reduction of intake manifold temps by eliminating the heat transfer/ heat soak associated with hot coolant running through the manifold. By modifying the manifolds flange (cutting off coolant portion) and running our adapter the coolant is kept away from the manifold completely, just like what you would find on the earlier PRB/ PRC heads, so NOW your Hondata IM gasket will really work!! We’ve seen drops as much as 18°!! Not to mention, the additional benefit of no longer having to drain the coolant when removing the intake manifold for maintenance or swaps… makes things a real SNAP!

We recommend a Trac Tuff 90* elbow fitting to use with OEM re-circulation hose

SKU: TTCP-R40 Category:

Additional Information

Weight 3 lbs
Dimensions 5 x 5 x 5 in


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