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THORN.INDUSTRIES
(801) 362-5484
Coil Kits Engineering About Apparel Order Contact Call (801) 362-5484
EST. NEPHI, UTAH · Grassroots born & raised

Smart Coil
Conversions,
engineered in the USA.

Bespoke ignition systems for the engines that matter — 2JZ, RB and VR38. We delete the factory ignitor, drop in proven coil-on-plug, and hand-machine every bracket, spacer and washer from US-made stock.

Explore the kits Request a build
2,000+HP-proven VR38 coils
100%US-made materials
Plug-n-Playwith aftermarket ECU

// Smart Coil Conversions

Built for the engines that make power.

Every kit eliminates the factory ignitor and replaces the stock coil packs completely — cleaner spark, fewer failure points, and a finished look under the cover. Designed drop-in; recommended with an aftermarket ECU for 100% plug-and-play.

Best Seller
THORN-JZ-SMARTCOIL-1

JZ Smart Coil Kit

Drop-in for the 2J VVTi / Non-VVTi in the stock location — clears the factory cover. Uses cleaned, tested & shielded D585 GM heat-sink smart coils.

  • Carbon-fiber upper brackets + G10 lower heat shield
  • Hand-machined, knurled spacers & beauty washers
  • NGK Blue plug boots + stainless hardware
Beauty washer:
$549kit · custom colors avail.
RB Series
THORN-RB-SMARTCOIL-1

RB Smart Coil Kit

Drop-in on all RB engines (minus the NEO) in the stock location — clears the factory cover without modification. Same shielded D585 smart-coil core.

  • Six-cylinder coil-on-plug array, fully shielded
  • Eliminates the ignitor & stock coil packs
  • US-made brackets, spacers & stainless hardware
$575complete kit
2,000+ HP
THORN-VR38-JZ-1

VR38 JZ Conversion

Brand-new VR38 OEM coils — proven time and again to handle upwards of 2,000 hp and fit under the OEM cover. Drop-in on the 2J VVTi / Non-VVTi in the stock location.

  • New VR38 OEM coil-on-plug — big-power ready
  • Eliminates ignitor & stock coil packs
  • Fits cleanly under the factory cover
$999flagship kit

Note: each conversion must be paired with a compatible custom ignition harness; we carry options that fit most setups. Questions on dwell, plugs or tach adapters? Call us — we build these by hand and set them up right.

// Inside every kit

Bespoke parts, machined to order.

No off-the-shelf adapters. Each component is engineered for the swap and finished to a standard you'll be glad lives under your cover. Tap any detail to take a closer look.

US-Made MaterialsEvery product, sourced & built stateside
Hand-MachinedKnurled spacers, beauty washers, brackets
More Spark, Fewer FaultsIgnitor deleted, modern coil-on-plug
Plug-n-Play100% with an aftermarket ECU

// Who we are

A shop, not a catalog.

Thorn Industries is a small, owner-run manufacturer in Nephi, Utah that builds high-end ignition hardware for the import performance world. We started where most good shops do — in the garage, solving our own problem — and turned it into bespoke kits people trust on 1,000+ horsepower builds.

We pride ourselves on custom, high-end automotive products. Every kit we sell uses US-made materials to ensure quality across the board, and the small stuff — the knurl on a spacer, the finish on a beauty washer, the routing of a boot — is done by hand because that's the part that lasts.

Grassroots born & raised · Made in the USA

// Swag

Wear the thorn.

Printed and embroidered in the USA. Rep the shop that builds your spark.

Thorn Industries Tee$20
Thorn Beanie$15
Thorn Trucker Cap$20

// Build request

Tell us about your setup.

Send your engine, ECU and harness details and we'll confirm fitment, lead time and the exact kit for your build — straight from the shop, no middleman.

  • Real fitment guidance for 2JZ, RB & VR38
  • Custom beauty-washer colors on request
  • Prefer to talk? (801) 362-5484
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No spam, ever. We reply personally, usually within a day.

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// Find us

Talk to the shop.

Call or text(801) 362-5484
Shop1470 N 200 W, Nephi, UT 84648
HoursMon–Fri 9–5 MT · Builds shipped nationwide
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