PERFORMANCE / EST. 2026
← All guides

Install

WRX: adjust the PERRIN PSP-INR-018 shifter stop

Part-specific instructions, fitment limits and final checks.

GUIDE OVERVIEW

Difficulty
Basic · 2/5
Time
1 min read; job time varies
Vehicle / platform
WRX with compatible PSP-INR-018 shifter mechanism; confirm year and shifter before purchase
Tools
  • 7mm open wrench
  • 10mm socket
  • Hex driver
  • Low-range torque wrench
Parts / supplies
  • PSP-INR-018 kit
STEP 01

Set the two gates

Remove the knob, select neutral and lift the boot/trim assembly. Select fifth and note the factory gap. Replace the two factory stop bolts with the supplied hardware and stop, initially loose. Adjust the factory stop in fifth and the PERRIN stop in first, leaving roughly 1/8 inch of movement at the knob.

Sources 1

STEP 02

Finish the housing

Use the 7mm wrench to remove the two small housing nuts. Add the supplied washers, center them and tighten only slightly beyond hand tight. Refit trim and knob, repeat the gear checks and recheck hardware after one week.

Sources 1

Products in this guide

Sources / references 2
  1. PERRIN official installation instructions ↗Reviewed Oct 8, 2026
  2. PERRIN official instructions database ↗Reviewed Oct 8, 2026

Questions about this guide?

Share your vehicle details and what you have tried. Community posts are moderated; technical answers require verification.

Related discussions → · Ask a question →
SHARE GUIDEX ↗Facebook ↗

KEEP READING

MORE FROM PHTM

Install

WRX six-speed: replace the shift-cable bushing

Part-specific instructions, fitment limits and final checks.

READ GUIDE →
Install

WRX: plan the PERRIN shifter-detent upgrade

Part-specific instructions, fitment limits and final checks.

READ GUIDE →
Install

BRZ/GR86: replace the rear shift-rod bushing

Part-specific instructions, fitment limits and final checks.

READ GUIDE →