AST 5100 Coilovers BMW E46 M3 Suspension Secrets AST 5200 Coilovers Porsche Boxster 986 Suspension Secrets AST 5100 Coilovers BMW E90 E92 M3 Suspension Secrets AST 5200 series 2 WAY Suspension for Porsche 997 911 GT3RS 2007 2012 AST 5300 Series Coilovers Porsche 911 996 C2 GT2 GT3 (2WD) RAC R2203S. The 5100 Series shock absorbers for the 1997 2005 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) utilize inverted upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment. The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension you can adjust rebound with one knob. The adjust platform allows you to adjust the ride height of your car. AST suspension shock bodies are specially designed to keep maximum stroke, even with a lower ride height. How a Monotube design works? Monotube design is essential for performance. The oil and nitrogen are separated by a floating piston, and allows the use of a larger piston, increasing the damper performance and sensitivity felt by the driver, all this added together produces more grip, gives more control and driver feedback from your vehicle. What is a rebound adjustment? Rebound controls the rate of extension of your shock absorber. By changing the rebound you can directly change the characteristics of the vehicle. Features Floating piston design with high pressure nitrogen means no cavitation around the piston. 14mm diameter internal shaft. 44. 5 mm diameter shaft struts, inverted. Steel cylinder body shocks, inverted. High end, track ready suspension. Rebound adjustable ('Singles'). Low friction seal. Adjuster knobs permanently mounted on the dampers. Designed to use OEM top mounts. Rubber bushings for 'eye' shock mounts. Includes springs. Rebuildable. Optional spherical top mounts. Optional DLC (diamond like carbon) coated shafts. Optional DDP (double digressive piston). Double Digressive Pistons are recommended for use on the non driven wheels. 4WD FWD vehicles: DD pistons for both rear axle struts shocks. RWD vehicles: DD pistons for both front axle struts shocks. Optional custom valving. Specifications Part Number: ACC P2203S Product: AST 5100 Series Adjustment: 1 Way System: Coil Over Product Note: True Coilover Front Rear Ratio: Front = 60% Rear = 40% Strut Shock Type: Front: Clamp McPherson strut Rear: Eye 2 pin strut Model Years: 1997 2005 Make: Porsche Model: 911 Chassis: 996 Spring Kit: Included Top Mounts: Front Rear Included Front Top Mounts: TMA P07 A1 20F Camber adjustable Optional Front Top Mounts: Not Available Rear Top Mounts: TMA P11 B1 30R Solid top mounts (no camber adjustment) Adjustable Front Droplinks Available? No Adjustable Front Droplinks Required? No Adjustable Rear Droplinks Available? No Adjustable Rear Droplinks Required? No DDP Pistons Included? No DDP Pistons Available? Yes DLC Coated Shafts Included? No DLC Coated Shafts Available? Yes QDC Included? No TUV Approved? Comments: Works with OE top mounts. Vehicle Fitment 1997 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 1998 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 1999 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2000 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2001 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2002 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2003 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2004 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996) 2005 Porsche 911 GT2 GT3 3. 6 NA Turbo 2WD (996)