BTR: SOLID ROLLER SPRING KIT - .700 LIFT - SK1237 8mm CALIBRATE SPEEDO FOR GEAR RATIO

CALIBRATE SPEEDO FOR GEAR RATIO  - Changing the gears in your rear differential is an excellent way of improving acceleration and 'off the line' performance

2011-2019 Toyota Tundra Double Cab/Crew Max 5

2014-2017 Porsche 911 Turbo (991/991

Exterior Components are vacuum-bagged and cured in the autoclave at high temperatures

Powder Coat

BTR: SOLID ROLLER SPRING KIT - .700 LIFT - SK1237 8mm CALIBRATE SPEEDO FOR GEAR RATIOBTR SOLID ROLLER SPRING KIT SK1237 SPRING SPECS: 190lbs @ 1. 800" 570lbs @ 1. 100" Coil Bind 1. 030" KIT INCLUDES: BTRXP1237 1 valve spring (16) SR532 16 retainer set SL128 16 locator set (stock guides) OR SL138 16 locator set (bronze guides) VS LS KIT valve seals VLM8 8MM 32 valve locks Features BTR SKU SK1237 Brand Brian Tooley Racing Part Type Valve Spring Kit Engine Type Gen III Gen IV LS Spring Type DUAL Max Lift N A Retainers Included YES