![Subaru STI Brake Cooling Ducts 2018-2021 ['New Products'] If your car has 1](https://cdn.shopify.com/s/files/1/0590/5131/1259/files/18-STI-Air-Ducts-Product-HR-1.jpg?v=1751497641)
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If your car has 1 tip on each muffler and you want to upgrade it to 2 tips on each muffler (also know as quad tips)
In the rear
From designing
Magnum FORCE Intake Replacement Air Filter w/ Pro GUARD 7 Media 3-1/2 IN F x 5 IN B x 3-1/2 IN T (Inverted) x 8 IN H
Crossover Balance Tube: The crossover balance tube equalizes and evenly distributes exhaust pulses traveling through the exhaust system
Subaru STI Brake Cooling Ducts 2018-2021 ['New Products'] If your car has 1The APR Brake Cooling Ducts are aerodynamically optimized to "funnel in" massive amounts of air. Also known as the venturi effect, when the vehicle speed increases, this funneled in air increases in both pressure and velocity as it passes from the larger frontal area into the smaller pipe section of the brake duct. When matched with appropriate high temperature air duct hoses (not included purchase hoses from your favorite racing supply shop), the APR
