Brand: ATI Performance Products Manufacturer's Part Number: ATI705030 Part Type: Automatic Transmission Servo Kits Product Line: ATI Servo Piston Kits Automotive Fittings Part Number: ATI-705030 UPC: 800157060649 Servo Type: 2nd gear Servo Material: Aluminum Quantity: Sold as a kit. Notes: This is a Corvette-style servo. This piston uses 2 Teflon seals,1 large, and 1 small. Seals are included. Description: If you're one of the millions of GM drivers with 700R4 or 4L60E/4L65E automatic transmissions that experience sluggish shifts, especially into second gear, you should consider swapping out your OEM servo for an ATI servo piston kit. Their piston kits are CNC-machined from 6061 T6 aluminum and are an easy upgrade. Don't be fooled by other servo assemblies that are nothing more than cleaned up OEM parts—ATI Performance Products has been producing quality performance-enhancing internal transmission components for decades.