Important Notes:

• NO ECU CALIBRATION REQUIRED

Technical Notes:

Over time, PRL has established itself as the go-to place for Honda and Acura performance. Our engineers have devoted substantial time to harnessing maximum power from this platform. We leave no stone unturned in our quest for performance, delivering top-notch and high-performing parts. With the introduction of the High Volume Intake System, we're proud to have raised the bar for Air Intake Systems for the FL5 and DE5 platforms.

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. Our 6061 aluminum tank will not be effected by temperature and can hold higher pressures so it will out-last the factory tank. Our 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. Our 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.

• 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

The development of the High Volume Intake System for the FL5 Civic Type-R and DE5 Acura Integra platform is complete. We have applied what we learned from our FK8 HVI and made significant improvements to the construction, materials, and overall design resulting in an Intake that rivals the best options on the market. Our FL5 Civic Type-R High Volume Intake system uses a 6" cone filter and an HDPE rotomolded air box. This air box uses the factory air duct and seal for optimal airflow and heat-soak reduction.

The factory rubber inlet connects to the box and extends over the core support. This rubber duct seals to the hood and channels air into the airbox via a duct in front of the radiator support. Our experience with the FK8 taught us the importance of keeping these cars cool during hard driving. Third-party testing revealed a 10-20hp loss when the hood is closed, indicating that the factory duct is a point of restriction. In response, we developed the secondary duct to address this issue of air starvation.