Perrin PSP-INR-132-7 Tapered Shift Knob Brushed Stainless for 15-25 Subaru WRX

Vehicle Fitment

• 2015-2025 Subaru WRX - all trims (VA and VB chassis, FA20DIT / FA24F, 6-speed manual, AWD)
• 2004-2021 Subaru WRX STI - all trims (GD, GR/GV, VA chassis, EJ257, 6-speed manual, AWD)

Fitment Notes

• Designed for 6-speed manual transmission Subaru WRX and WRX STI models only - the "-7" suffix in Perrin's part numbering system denotes 6-speed fitment
• The 2015-2025 Subaru WRX uses a 6-speed manual and is fully compatible - this knob fits both the VA (2015-2021) and VB (2022-2025) chassis WRX
• The Subaru WRX STI was discontinued in the US after the 2021 model year - this knob fits all 2004-2021 STI production years
• Includes a billet aluminum rattle-fix adapter specifically designed to seal around the reverse lockout lever on 2015+ WRX models - eliminates the shifter rattle common in high-mileage or aggressively driven WRXs
• The super locking mechanism secures the knob without damaging the shifter threads - no thread damage during installation or removal
• Height is adjustable up to 1 inch - set once with the adjustment screw and lock bolt; knob will not loosen during driving
• Warranty: 5-year limited from Perrin Performance (original purchaser)

Features

• Tapered design - the conical shape narrows from a larger diameter at the top to a smaller grip point lower on the knob, providing a natural hand position that guides the palm for confident, precise gear changes
• 1.8 in. diameter - slightly smaller than OEM for a more focused, direct feel in the hand during shifts
• Heavyweight stainless steel body - at 1.05 lbs (480 g), the Perrin knob weighs approximately twice the OEM shift knob, improving shift feel and momentum through the gate
• Heavier shift knobs reduce shift effort and improve shift smoothness - the added rotational momentum of the heavier knob carries the transmission through the gate more fluidly, especially when paired with an aftermarket short shifter
• Precision machined brushed stainless steel finish - a raw brushed appearance that resists fingerprints, complements both modern and rally-inspired interiors, and maintains its appearance indefinitely without degrading from UV exposure or skin oils
• Built-in height adjustment - the knob height can be raised or lowered by up to 1 inch using the integrated adjustment screw, allowing the driver to position the knob at the ideal ergonomic height for their seat position and driving style
• Self-locking mechanism - once the lock bolt is tightened, the knob will not back off or loosen during spirited driving, without applying any damaging force to the shifter threads
• Billet aluminum rattle-fix adapter (lower piece) - engineered to fit precisely around the reverse lockout lever on 2015+ WRX models, sealing the gap that produces the characteristic shifter rattle on high-mileage and aggressively driven examples
• Multi-piece design - the separate upper knob and lower adapter allow for accurate installation, clean appearance, and easy removal if needed
• 5-year limited warranty from Perrin Performance

Specifications

• Part Number: PSP-INR-132-7
• Product: Tapered Shift Knob with Rattle-Fix Adapter
• Style: Tapered
• Knob Diameter: 1.8 in.
• Knob Body Material: Heavyweight stainless steel
• Adapter Material: Billet aluminum
• Finish: Brushed stainless steel (raw)
• PERRIN Knob Weight: 1.05 lbs / 480 g
• Transmission Fitment: 6-speed manual only
• Height Adjustment Range: Up to 1.0 in. (built-in adjustment screw + lock bolt)
• Rattle Fix Included: Yes - billet aluminum adapter seals around reverse lockout lever
• Warranty: 5-year limited
• Quantity: Sold individually (1x shift knob with adapter and hardware)

Included Components

• 1x PERRIN tapered stainless steel shift knob (upper body)
• 1x Billet aluminum reverse lockout adapter (rattle-fix lower piece)
• Mounting hardware (height adjustment screw and lock bolt)
• Warranty card and installation instructions

Product Description

The Perrin PSP-INR-132-7 is a heavyweight tapered brushed stainless steel shift knob engineered for the 6-speed manual transmission in the 2015-2025 Subaru WRX and 2004-2021 WRX STI. At 1.05 lbs (480 g), it weighs approximately twice as much as the OEM shift knob - a deliberate design choice that directly improves shifting dynamics. The added mass creates rotational momentum in the palm as the driver moves the stick through the gate, carrying the transmission through the engagement point more fluidly and reducing the physical effort required for each shift. This effect is especially noticeable when combined with an aftermarket short shifter, where the shorter throw benefits most from the momentum provided by a heavier knob.

The tapered profile narrows from a wider upper section to a more focused lower grip, providing a natural hand position that guides the palm consistently to the same location on every shift. The 1.8 in. diameter is slightly more compact than OEM, giving the driver a tighter, more direct feel without sacrificing comfortable palm contact. Each knob is precision machined from solid stainless steel and finished with a raw brushed texture that resists smudging and fingerprints, maintains its appearance indefinitely, and pairs naturally with the silver-toned interiors of the WRX and STI. A built-in height adjustment mechanism allows the knob to be positioned up to 1 inch higher or lower than standard, set with a single screw and locked with a bolt that secures the knob without applying damaging torque to the shifter threads.

The multi-piece design includes a billet aluminum lower adapter specifically engineered for the 2015+ WRX reverse lockout lever geometry. This adapter seals precisely around the reverse lockout mechanism, eliminating the shifter rattle that commonly develops in the WRX's high-mileage examples or after aggressive driving. No factory plastic fasteners or OEM hardware are required - all necessary mounting components are included. The complete kit is backed by Perrin's 5-year limited warranty.