TracTuff K24 Coolant Adapters

The OG water bypass adapter! Imitated but not duplicated. Still the best looking, best fitting (leak free!), and now the least expensive!
The water bypass allows RAA, RBB, RBC, and RSP cylinder head owners to run the more popular aftermarket intake manifold options that were designed for the earlier PRB/ PRC cylinder head 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 smart purchase! Benefits such as a reduction in intake manifold temps by eliminating the heat transfer/ heat soak associated with hot coolant running through the manifold; by simply modifying the manifolds flange (cutting off coolant portion) and running this adapter, the coolant is kept away from the manifold completely, just like what you would find on the earlier PRB/ PRC heads. NOW your Hondata IM gasket will really work!! I've personally seen drops in temp 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! It makes that job a real SNAP.
 
Essentially an OEM replacement upper water neck for the K24A, K24A2, K24A4, K24A8, and K20Z3.
The billet K series water neck flange eliminates the bulky OEM piece with its huge heater core fitting and EGR provision. The RBB/ RBC water neck assembly starts with a beautifully machined 6061-T6 aluminum flange that incorporates the largest port possible within the OEM gaskets footprint, a welded 1.25" tube that mimics the OEM outlet position, and a 1/2" NPT heater port. The hardware includes four M8 stainless steel socket head bolts, a 90° heater hose fitting, a plug in the event you don't plan on connecting a heater hose, and as of 8/1/20 a Genuine Honda gasket.
 
To Accomdate installation of your kit we include a tube of Hondabond as well!