The H&R 29970 is a progressive-rate sport spring set built for the BMW E36 318ti Compact, the hatchback version of the E36 with the 1.8L M42 or 1.9L M44 four-cylinder. Made in Germany from (hf) 54SiCr6 spring steel and shot-peened, the set lowers the front about 1.4 inches and the rear about 1.0 inch. That drop lowers the center of gravity, reduces body roll, and tightens the fender-well gap while keeping the ride comfortable for daily driving. Owners on user forums commonly pair these springs with Bilstein Sport shocks, so a buyer looking for an E36 318ti lowering spring with real handling gains and a street-friendly ride can use this set as the foundation of a sport suspension.
Fitment is the key purchase check. The 29970 is listed primarily for 1995 to 1998 318ti models, and cars with a factory sport suspension can sit at a different height than the published drop. Because the progressive rate is firmer than stock, these springs suit street use and occasional track sessions rather than competition ride-height setups. Buyers searching for a 318ti sport spring that handles better than stock, with a documented 1.4 inch front and 1.0 inch rear drop, should confirm their exact year and engine before ordering.
Opinions on user forums differ. Some owners report that non-ti E36 springs fit and lower the car, while others insist only 318ti-specific springs should be used. Confirm fitment with the manufacturer before substituting.
Owners on user forums typically pair these springs with Bilstein Sport shocks, which are designed for lowered cars. Replacing the shocks at the same time helps the lowered ride height and damping work together.
The 29970 is listed for 1995 to 1998 318ti models with the M42 1.8L and M44 1.9L engines. Some published fitment ranges differ, so confirm your exact year and engine with the manufacturer before ordering.
This is a moderate driveway job for someone comfortable with suspension work. Owner write-ups for the E36 Ti chassis describe removing the strut-to-control-arm bolts, freeing the control arm, and lifting out the old spring, then transferring the rubber spring seats to the new springs. Rear springs are marked with an (R), and the printed writing should face up when installed. Plan on 19mm and 21mm sockets, a 10mm socket, a floor jack, and jack stands. Owners recommend lubricating the strut bushing with WD-40 so it slides into place, and marking the offset washer and bolt head before removing the inboard lower swingarm bolt so they realign correctly. Get a wheel alignment after installation.
