{"product_id":"empi-8-5mm-hei-ignition-spark-plug-wire-set-with-coil-wire-part-00-9442-6","title":"EMPI 8.5mm HEI Spark Plug Wire Set with Coil Wire — VW Type 1 High-Energy Ignition (00-9442-6)","description":"\u003cp\u003eEMPI 8.5mm HEI-style spark plug wire set with matching coil wire — for high-performance, high-energy ignition systems on VW Type 1 air-cooled engines. The thicker 8.5mm wire diameter, upgraded silicone insulation, and HEI-style boots make this the right wire set for engines running MSD, Crane, Pertronix Ignitor II\/III, or other high-output electronic ignition systems. EMPI part #00-9442-6.\u003c\/p\u003e\n\n\u003ch3\u003eWhy HEI 8.5mm wires for performance ignition\u003c\/h3\u003e\n\u003cp\u003eHigh-energy ignition systems produce significantly hotter spark than stock points or basic electronic ignition modules. That hotter spark needs thicker, better-insulated wires to deliver the energy to the plug without breakdown, crossfire, or radio interference. Stock 7mm Bosch wires are designed for stock-output coils and don't handle high-energy ignition well over time.\u003c\/p\u003e\n\n\u003cp\u003e8.5mm wires with silicone insulation hold up to the higher voltage, resist heat breakdown, and don't develop the crossfire that's common between adjacent cylinders when wire insulation starts to fail. The HEI-style boots seal tightly around the spark plug and coil tower, eliminating moisture-induced misfires.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 8.5mm (vs. 7mm stock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e HEI (High Energy Ignition)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation:\u003c\/strong\u003e Silicone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoots:\u003c\/strong\u003e Custom HEI-style spark plug boots, plus matching coil wire boot\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as:\u003c\/strong\u003e Complete set (4 plug wires + coil wire)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 00-9442-6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVW Type 1 air-cooled engines running high-output electronic ignition\u003c\/li\u003e\n\u003cli\u003eVW Beetle, Karmann Ghia, Type 3, Thing\u003c\/li\u003e\n\u003cli\u003eVW Bus \/ Transporter through 1971 (Type 1 engine)\u003c\/li\u003e\n\u003cli\u003eDune buggies, sand rails, and kit cars with performance ignition setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBest paired with:\u003c\/strong\u003e MSD ignition boxes, Crane high-energy ignition, Pertronix Ignitor II\/III, or any aftermarket coil rated for high secondary voltage. For stock points ignition, standard Bosch wires (#98-9986-B) are correct and these are overkill.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these work with stock points ignition?\u003c\/strong\u003e\u003cbr\u003e\nFunctionally yes, but you don't need them. Stock points ignition produces moderate spark voltage that standard 7mm Bosch wires handle perfectly. The 8.5mm HEI wires are designed for the higher voltage of performance ignition systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo these reduce radio interference?\u003c\/strong\u003e\u003cbr\u003e\nThe 8.5mm HEI wires include suppression to manage RF interference. They're generally well-behaved with car audio installations, though high-output ignition systems will always produce more RF noise than stock setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill they fit my Type 4 engine?\u003c\/strong\u003e\u003cbr\u003e\nThe fit depends on plug location and distributor cap style. The Type 1 wire set has specific lengths and termination styles for the Type 1 engine layout. For Type 4 (1972+ Bus, 411, 412, Porsche 914), confirm fit before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre the boots heat resistant?\u003c\/strong\u003e\u003cbr\u003e\nYes. Silicone HEI boots withstand the high temperatures of an air-cooled engine bay far better than rubber boots, which crack and harden over time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's the lifespan?\u003c\/strong\u003e\u003cbr\u003e\nQuality 8.5mm silicone HEI wires typically last 50,000–100,000 miles or 10+ years of moderate use, whichever comes first. Significantly longer than standard 7mm wires under similar conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo they come with a coil wire?\u003c\/strong\u003e\u003cbr\u003e\nYes. The set includes the four spark plug wires plus the coil-to-distributor wire — everything from coil to plug.\u003c\/p\u003e","brand":"Washburn's Metal","offers":[{"title":"Default Title","offer_id":44474567196787,"sku":null,"price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/00-9442-6-500x333.jpg?v=1774332940","url":"https:\/\/shop.washburnsmetal.com\/products\/empi-8-5mm-hei-ignition-spark-plug-wire-set-with-coil-wire-part-00-9442-6","provider":"Washburn's Metal","version":"1.0","type":"link"}