TSM l Fortune Auto COILOVERS at the BEST PRICES AROUND!!! TopSpeed Motorsports is an authorized dealer of Fortune Auto! We have had GREAT results with these coilovers on the track and the street. Custom valving and spring rates are available as well as Swift Spring upgrades! All coilovers incorporate a DIGRESSIVE* Mono-tube 57mm piston, 30 way damping, custom rates & a 1 year warranty. 510 series coilovers incorporate a "ULTRA" DIGRESSIVE" piston, 24-step damping, custom rates & a five year warranty 510 Series coilovers are CUSTOM built to order. Incorporates all the great features of our 500 series coilovers. Furthermore it includes our new "Ultra" Double Digressive Pistons. Featuring our new "Ultra" Double Digressive Piston (UDDP) with revised shim stacks, this "Ultra" Digressive piston allows for massive amounts of low speed rebound force that helps with driver inputs such as dive, pitch and roll. Furthermore, the rebound force greatly tapers off to provide the driver with "blow off" This helps with large impacts on track helping the vehicle stay settled after hitting curbing at high speeds. After countless hours on the shock dyno and testing on the track, we are proud to offer these high performance coilovers that rival many high end European shocks that cost several thousand dollars more. Due to the ultra digressive nature of this shock absorber, this product is recommended for track use only. Assembled in the USA Dyno tested Dyno graph supplied with all 4 shocks Mono-Tube damper with high pressure nitrogen 24-step rebound adjustable dampers Spherical Bearings Amsoil synthetic shock oil (the ultimate in shock oil technology) 6061 Forged & Anodized aluminum mounts and camber plates Bright Dip Anodized Height adjustment independent of pre-load "Ultra" Digressive piston Compliant track suspension solution 5 year Manufacturer's Warranty (1 year on piston) Swift springs upgrade available Rebuild-able Revalve-able Modularity - Upgradeable to 2-Way Canister* *Upgradeable to 2-Way canisters at any time, insuring that your investment is a sound one. Update without the need of investing into a complete new coilover system down the road; just send your 510 series shocks into our service center for the modular 2-Way upgrade. All Generation 4 dampers are fully rebuildable, serviceable, and can be custom valved at any time. Please consult our 2-Way application list for more details and availability. Revised Jetting When the Fortune Auto engineers designed the Generation 4 Series, they made it a priority to revise the jetting for more accurate damper control. The engineers also increased the adjustment range. Every click in the adjustment range now has a very profound effect on damping force and each click is very audible and distinct. We responded to our clients' comments regarding the lack of audible distinction in the clicking mechanism. Our desire is to constantly refine our products using the valuable feedback from our clients, so we have addressed this issue with our Generation 4 shocks. Stronger Piston Shafts The data we have compiled through our racing program has been thoroughly implemented in our new Generation 4 Series. The delicate science behind the strength of piston shafts can be difficult to perfect. If the shaft is too hard, it will be brittle and break easily, but if the shaft is too soft it will bend too easily. Through extensive R&D we were able to achieve an optimal balance between shaft hardness and malleability in the Generation 4 Series to ensure peak safety and performance. Lower Friction Shaft Seals The new Generation 4 shaft seals have 40% less drag than our previous models. This provides for less hysteresis and for superior control of driver inputs. Our new seals are made of a specially formulated Buna rubber compound that provides a great balance between reliability and performance! Since the shaft seal is the most important seal on the shock, a stronger seal will greatly improve quality and performance. Improved Shaft Cap Design Our new shaft caps utilize a twin O-ring design. Furthermore we have upgraded our rubber O-rings to Viton O-rings. The new Viton O-rings are made of a synthetic rubber compound which provides a superior tensile strength and a wider range of operating temperatures. This new design provides a superior seal preventing potential leaks from developing. Structural Improvements Utilizing our engineers' in-house design software we were able to revamp our whole line of suspension in the Generation 4 Series. We reinforced brackets and mounting points for more rigidity and strength. Brake Line Brackets Now most models will have OEM brake line tabs welded to the lower mounts. This provides the end user with a clean and safe install solution. Digressive & Ultra Digressive Pistons To ensure superior ride quality and driver control, the digressive piston technology on our 500 and 510 series has been carried over to the Generation 4 Series as well. All Generation 4 shock absorbers will continue to utilize our digressive piston technology on our 500 series models and ultra digressive piston technology on our 510 series models. Digressive piston technology allows for massive amounts of low speed rebound force that translates driver inputs into razor sharp control. Furthermore, the rebound force "blows off" to provide the driver with a supple and compliant ride while maintaining superior mechanical grip over rough surfaces. Dyno-tuned and Tested Our commitment to providing the best shock absorber in the market has not changed with the Generation 4 Series. EVERY shock absorber is still dyno-tested at our facility. We do not spot check our shocks like some other manufacturers. Once your shock absorber is built it is tested and matched. We refuse to treat our shocks with a “one size fits all” mentality. Our philosophy is simple: to provide our clients with a high quality, affordable, and personalized suspension solution. Let Topspeed setup your car properly!! Contact us today!!