Karlyn / STI part number 325W/LOOM is a premium OE-equivalent spark plug ignition wire set engineered specifically for classic BMW models equipped with the 2.7L M20 "eta" inline-6 engine. I liked these sets because they used German Bremi hardware and because the manufacturer was only 8 miles from my office. This wire set is built specifically for older BMWs using a factory distributor setup and plastic wire routing loom:
- BMW 3-Series (E30): Fits the 1984–1987 BMW 325e and 325es (2.7L 6-cylinder).
- BMW 3-Series (E30 Base): Fits early base-model 1986 BMW 325 models with the 2.7L engine.
- BMW 5-Series (E28): Fits the 1982–1987 BMW 528e.
- Important Fitment Cutoff: For 1987 528e models, this specific set only fits vehicles manufactured on or before February 28, 1987.
Technical Product Features
- Integrated Wire Loom: Features a pre-installed, organized loom system that safely mirrors factory routing, locking the individual leads in place to protect them from severe engine heat and vibration.
- Silicone-over-Silicone Jacket: Built with thick 8.0mm dual-layer extruded silicone insulation capable of withstanding operating temperatures up to 600°F (250°C+) while preventing high-voltage leaks.
- High Conductivity Core: Uses an upgraded stainless steel magnetic conductive winding wrapped over a tinned copper core for optimal spark transfer and built-in ignition noise suppression.
- German-Engineered Boots: Features original equipment style 90-degree distributor boots and positive-locking spark plug terminals that sit perfectly inside the cylinder head recesses.
(Note: If you have a later-model 1987–1991 E30 325i, 325is, or 325iX featuring the high-revving 2.5L engine (ie, "super-eta"), this "325" kit will not fit correctly. The 2.5L engines require a different wire set layout and include a pulse sensor clamp on the #6 wire) (2289)
