Made in USA. This #10 Male O-ring Bulkhead x 5/8" Heater Hose Adapter Fitting installs in a 7/8" hole through your firewall or bulkhead and is secured with the supplied bulkhead nut. Connect conventional 5/8" heater hose with a clamp and install a #10 O-ring hose end fitting on the opposite side of firewall or bulkhead.

Pure Stealth Heater Fittings are coated with our proprietary ceramic coating. The coating is extremely durable but it can be scratched. Care should be taken during the installation process to prevent damaging the coating.