Subaru Genuine OEM Exhaust Bumper Cover Left Hand Side RCM 15% and offers a 47% increase

and offers a 47% increase in airflow volume over the factory MAF housing or Standard Bore HVI MAF

There are many other technical aspects such as "scavenging effect" which are beyond the scope of this document

or fussing with adjustable engine stand mounts

Featuring (2) Silicone o-rings

Subaru Genuine OEM Exhaust Bumper Cover Left Hand Side RCM 15% and offers a 47% increasePro Speed Racing only stocks brand new, genuine OEM Subaru parts so you can trust your Subaru will run optimally and get back to original condition. This listing is for the left hand side OEM exhaust bumper cover. Vehicle Fitment: 2022+ Subaru WRX VB