H Sport’s Stage I Kit for the BMW 3 Series cars consists of two products engineered to work together for everyday road and track day handling. All Stage I Kits include H Sport Coils (#19824), along with bump stops (front and rear) and a Sport Tubular Sway Bar Kit (#22825). The Sport coils will lower the E46 approx. 19mm front, 9.5mm rear while retaining excellent ride quality. Replacement bump stops are also included for additional extra travel needed with the lower stance. To compliment the Sport coils, the Stage I Kit includes the Sport Sway Bar Kit consisting of adjustable, tubular front and rear sway bars, polyurethane bushings, bushing brackets and zerk fittings for easy lubrication. H Sport’s unique rear sway bar bushing bracket allows the use of zerk fittings and also adds strength to the subframe. The Stage I Kit is perfect for those who enjoy canyon-carving and occasional track day events.

Specifications
Coil Springs 
Drop (based on E46 330ci w/ factory sport suspension)
Frt: 3/4" (19mm) Rr: 3/8" (9.5mm)
Rates: Frt: 185 #/in Rr: 325 #/in
 
Sways
Front 30mm Tubular 3 Position Adjustable
Stiffness: +31%, +51, +77% (Compared to factory E46 sport suspension)

Rear 25.5mm Tubular 2 Position Adjustable
Stiffness: +138%, +171% (Compared to factory E46 sport suspension) 

Testing Data
2004 BMW 330 Ci

600’ slalom
Stock 65.3 MPH vs. H-Sport Stage One TVS 68.4 MPH
3.1 MPH gained by installing an H-Sport Stage One TVS package

200’ Skid Pad
Stock .85g vs. H-Sport Stage One .91g
.6g gained by installing an H-Sport Stage One package

Stock M3 as tested by Road & Track
600’ Slalom Stock 68.3 MPH
200’ Skid Pad Stock .87g