TracTuff PRB/ PRC "Race" Filler Neck
An inexpensive solution for all you K20A, K20A2, K20A3, K20Z1, and K24A1 engine owners looking to simplify your cooling system! Whether you have added a radiator that does not have a radiator cap bung or you are just in need of a higher fill point to aid in burping the sometimes troublesome k series cooling system, we've got you covered.
The filler neck starts with a beautifully machined 6061-T6 race flange with a machined o-ring groove for the OEM gasket and your choice of outlet angle and connection type.
NOTE: Made to Order - Contact for ETA - If you are interested in a specific design that varies from this, please email us at sales@tractuff.com. If you have questions related to the configuration or options... PLEASE visit the WHATS WHAT or FAQ page. The cap bung has a 1/16" NPT port for connection to an overflow and uses early model Honda radiator caps; such as an 88'-91' Civic/ CRX or 90'-93' Integra. If you are using AN lines, I recommend designing the upper radiator hose so that there is droop/ give... so the engines movement and does not push/ pull on the radiator and fatigue any parts.
NOTE: The RACE version does not have a water bypass hose port, making this a DRAG RACE ONLY product where a thermostat is not likely being used. I do not recommend deleting the thermostat in any other environment. The hardware kit includes two stainless M6 socket head bolts and a Genuine Honda gasket. The filler tube is welded so that it sits level when bolted to an engine leaned back 15° (OEM position) for the traditional option and leaned forward 8° (intake side) for the gangster lean mount option.