Billetworkz Subaru STI 2004-2021 Black Reverse Lockout | BW-RL-STI-BLK Vehicle Model_M5 The second number is the

The second number is the inner diameter of the hubring (used to match the center hub diameter of your wheel hub)

They have developed these mounts for competition use

such that it offers protection from the elements without being unnecessarily exposed to the heat of the engine bay

Part #: 489-895-6545SBK

Featuring Innovate's patented DirectDigital™ Wideband technology

Billetworkz Subaru STI 2004-2021 Black Reverse Lockout | BW-RL-STI-BLK Vehicle Model_M5 The second number is theBilletworkz STI One Piece Reverse Lockout is the perfect accessory to add to your interior. This Reverse Lockouts include two internal O rings to minimize vibration and rattling. They also include a stainless steel set screw to hold in place, rather than a roll pin. This part is a direct replacement for the OEM reverse lockout and boot retainer. Each Reverse Lockout is custom anodized to provide a unique and scratch resistant layer. Be sure to