Recommendation: Performance strut upgrade to control increased spring rate.

INTRAX quality starts at the source. All INTRAX springs are produced under strict quality guidelines assured by ISO 9001 standardization. From the raw Chrome Silicon sourced from Bekaert in Belgium to our box producer in Germany, INTRAX and its suppliers are held to the highest standards in the industry. While European and private label products carry TUV certification for the German, Austrian and Danish markets, INTRAX US versions are produced identically, even without requirements for TUV approval. Don't be fooled by manufacturers who claim to carry TUV approval on US version springs; they are at best stretching the truth to sell more product. The United States, with their stringent safety standards usually require a unique design from their European counterparts. This changes the design enough that it would require another TUV certificate (again, not required for US). INTRAX is proud to offer unsurpassed quality in the US and Europe; no misleading sales pitches, just the finest springs.

INTRAX is an elite spring manufacturer. All INTRAX springs are cold wound on either Wafios CNC, or WM series of PC-based coiling equipment (sold to manufacturers worldwide). Manufacturing there own spring winding equipment puts them in an elite league, as none of the competitors have mastered this skill. INTRAX springs up to 16mm are produced from the highest quality Chrome Silicon wire, while 17mm and up are produced from Chrome Vanadium.

What makes INTRAX springs better? INTRAX designs most of its lowering kits with progressive rates, to satisfy the two features you've asked for most. First, the lowered look. Most other brands' springs are linear rate, as this is cost-effective but doesn't necessarily provide the visual effect you desire. By designing a progressive spring, they achieve the lowered look while maintaining safety standards of spring preload at suspension droop. The second requirement is ride quality. Since most of you identified that you drove 90% of your mileage to and from work, you wanted to retain some ride quality enjoyed with OE springs. If you're driving to work on a racetrack, "Sport" or "Race" springs from other brands may be for you. INTRAX progressive springs provide high performance looks and comfortable ride quality. INTRAX creates the finest springs, from start to finish. INTRAX springs begin the forming process with cold winding to the most exacting standards. Within two hours of forming, springs are stress relieved in an oven (not to be confused with heat treating), and then shot peened to remove surface imperfections and further relieve internal stress. This can extend service life of a spring up to 200% or more. Next, the spring is "blocked" (wound to a longer length than required, and set in a hydraulic press to obtain designed free length). This eliminates the "settling" other brands require, due to the lower cost of their production processes. Finally, springs are Phosphate coated for corrosion resistance, and electrostatically powder coated to ensure a lifetime of outstanding looks.