The B&M Shift Improver Kit the easiest way to get the stout performance you've always wanted out of your automatic transmission - and you get two modes of performance to select from: Heavy Duty, or Street/Strip. It's our least expensive and simplest to install kit. All you need are some hand tools! In the space of an afternoon, you can turn your transmission into a B&M-tuned unit! Ask the thousands of satisfied customers that have installed one in their transmissions!

• Recalibrate your automatic transmission for optimum performance & extended life!
• Select the mode that best suits your application:
1. STAGE 1. HEAVY DUTY; Firm positive shifts without loss of driver comfort for improved performance in all street vehicles. Recommended for regular passenger vehicles.
2. STAGE 2. STREET/STRIP; Provides positive shifts for high performance street use or for competitive events. Thislevel is for the enthusiast who wants the hardest, quickest possible shift.
• Provides crisp shifts on any stock automatic transmission
• Eliminates shift overlap & excess wear on clutches & bands due to slippage
• Application: Buick, Chevrolet, GMC, Olds, Pontiac - '65-'87 TH-350 and M38