Mugen Inner Door Protector Set - Civic FL 51320-S04-003 while running too lean may

while running too lean may result in serious engine damage

The header is manufactured from SUS304 stainless steel

With the stock air intake configuration

This also provides secondary benefits

The Pro Series Exhaust Cam Gear for Honda's K20/ K24 engines enables serious tuners to optimize horsepower and torque by being able to further adjust camshaft timing

Mugen Inner Door Protector Set - Civic FL 51320-S04-003 while running too lean mayFormed in 1973 by Hirotoshi Honda, the son of Honda founder Soichiro Honda, Mugen is recognised around the world as Hondas premium tuning arm, despite not formally being owned by Honda. Offering performance enhancing parts for many Honda vehicles, Mugen is a brand that manufactures top quality parts which aim to improve the experience of the driver. These inner door protectors prevent damage to your door cards when entering and exiting your FL Civic