A Subaru Flat-6. In your Porsche.

And It’s Brilliant.

The Subaru EZ30r flat-six is one of the most underrated engines ever built. Bulletproof reliability. Readily available parts at normal prices. Modern fuel injection. And it bolts into your 911 or 912 like it was meant to be there.

What’s In The Crate?

One crate. One weekend. Your Porsche, finally driving the way it was always meant to.

The Lästern Kit is purpose-built from the ground up — every bracket, adapter, and wire engineered specifically for your 911 or 912. No more excuses. No more garage queen syndrome. This shows up at your door in a crate and you could be driving in a matter of hours.


  • Refreshed & Modified Subaru EZ30R Flat-Six — A 3.0L, 24-valve DOHC engine producing 300hp with the included headers and tune. 65 lbs lighter than the Porsche flat-six it replaces. Bulletproof reliability, parts at human prices, and a 1-year warranty. 
  • Custom Rennch Engine Cradle — Bolts directly to your factory 911 engine mounts. No cutting, no welding, no modifications to your chassis. It fits because we built it to fit.
  • Custom Rennch Headers — Designed to bolt to your factory Porsche exhaust. The swap plays nice with what you already have. You can also send us your favorite exhaust and we’ll bolt it up and include it in your crate. 
  • Custom Rennch Top-Mounted Radiator & Mount — Purpose-built for rear-engine Porsche packaging. Cooling solved.
  • Transmission Adapter Plate — Mates the EZ30R directly to your existing Porsche transaxle. No guesswork. Transmissions currently supported include 901, 915, 923, G50. Future G96.
  • Haltech or Link ECU — Pre-loaded with a professionally tuned base map. Modern engine management, consistent cold starts, turn the key and go — like a car built in this century.
  • Complete Wiring Harness — Every wire pre-run, labeled, and ready. No electrical nightmares.
  • Drive-By-Wire Throttle Pedal & Custom Rennch Adapter — Modern throttle feel with clean, factory-style integration.
  • All Hardware & Mounting Components — Every bolt, bracket, and fitting. If it’s needed for installation, it’s in the crate.

Compatible with 1966–1989 Porsche 911 and 912. Requires factory 911 engine mounts in the engine compartment. Clutch and muffler not included.


Your Porsche has been waiting long enough.

You bought a driver’s car. It’s time to drive it. The Lästern Kit is engineered and tested so you can spend your weekend driving twisties instead of turning wrenches. One crate. A few hours. And a flat-six that will never strand you, never bleed your wallet dry, and never give you a reason to leave it in the garage again. Oil changes are $40 at any quick lube — not $300+ at a specialist. Filters, plugs, belts — all of it is on the shelf at AutoZone. No more Porsche tax on every single service. Just reliable, affordable, turn-the-key driving the way it should have always been. Stop storing it. Start driving it.

The Lästern Kit — $16,500

The base kit includes everything you need for a complete, turn-key swap with your choice of standard finish options and a color-matched radiator mount from our available palette. Shipping is additional and will be calculated based on your location.

Want something truly one-of-a-kind? Add a fully custom powder coat color to your radiator mount for $200 — your color, your car, your kit.

Looking to go further? Turbo builds, heat and A/C options, and additional performance upgrades are planned and priced during your consultation call. The platform scales with your ambition.

All custom finishes, performance upgrades, and build options are discussed during your personal consultation.

Ready to get in line?

These kits typically ship in about 3 months. Right now we’re running 6 months out due to a full build queue and custom components in manufacturing. Use the time to prep your car — it’ll be worth it.

A $7,500 deposit holds your place in the build queue and is applied toward the total cost of your kit.

Who’s This For?

Someone with a shell, but no engine

Sometimes you have a racecar shell or a car that you don’t want to invest $45,000 for 180HP

Someone who wants more than 90 HP

At their most powerful, a pre-89 911 had 217hp.  So this would be the highest hp upgrade you could make to an early 911. 

Someone Who Wants To Add A Turbo or Tune Their Engine

These Subaru engines are VERY tuneable and turbo-able, and MUCH easier and cheaper to deal with than our Porsche brethren.  A turbo Porsche motor will cost in the neighborhood of $70k+

Someone Who Wants To Build A fun Track Car Without Blowing Up Their Porsche Engine.

If you want a regular track car but worry about your expensive, rare Porsche engine, this is the perfect solution.  Cost-wise, you could buy an engine or two as a spare and it would cost less than a single piston.  😛 

You, Probably

Why wouldn’t you?