Baffled Coolant Expansion Tank by PRL Motorsports

Over time, the factory plastic coolant expansion tanks that Honda/Acura include from the factory can weaken and fail from heat and pressure cycles. The PRL Coolant Expansion Tank kit replaces the factory tank with a more robust aluminum version. This 6061 aluminum tank will not be effected by temperature and can hold higher pressures so it will out-last the factory tank. The reservoir also more than doubles the tank’s coolant capacity to 1.32 quarts (1.25 liters), while the stock tank only holds .58 quarts (.55 liters) allowing for a greater volume of coolant to carry heat away from the engine internals while maintaining a tidy engine bay.

PRL’s tank is constructed from 3mm thick aluminum and features internal baffling to prevent coolant sloshing and cavitation. The kit includes all necessary fittings to fit either the FK8/FL5/DE5 Civic Type-R/Integra Type-S applications as well as the fittings needed to fit the 2016-2021 Civic with the 1.5t engines.

Features

• Robust 3mm 6061 Aluminum Construction
• Laser Cut and TIG Welded for Unmatched Fit and Finish
• Striking Red or Black Anodized Finish with Laser Engraved Logos
• Billet Machined Barb Fittings and Sight Glass
• Buna-N O-Rings for Unmatched Temperature and Leak Resistance

Benefits

• Holds Higher Pressure Than Factory Tank
• More Than Doubles the Factory Tank’s Coolant Capacity
• Internal Baffling Prevents Coolant Sloshing and Cavitation

Applications

• 2016-2021 Honda Civic 1.5T
• 2017-2021 Honda Civic Si
• 2017-2025 Honda Civic Type-R
• 2024-2025 Acura Integra Type-S

What’s In The Box?

• 1 – Fully welded and anodized expansion tank (red or black)
• 1 – 1/16 NPT 8mm barb fitting
• 2 – 8AN ORB 14mm barb fittings
• 1 – 8AN ORB 17mm barb fitting
• 1 – 8AN ORB 8mm barb fitting
• 1 – 10AN sight glass

Warranty

• PRL Motorsports warrants that all parts/components manufactured by PRL Motorsports or sold under the PRL Motorsports brand, and directly purchased from PRL Motorsports or an Authorized PRL Motorsports Dealer honor a 12-month limited warranty from the date of purchase against manufacturing defects in the materials and craftsmanship.