Skip advert
Advertisement

Incredible on-board lap of Laguna Seca in a Porsche 935 K3

Leh Keen grapples with 800bhp of turbocharged, oversteering monster round the daunting inclines of the Mazda Raceway

The sound, the oversteer… We know it’s only Monday but we doubt you will see a cooler on-board video this week. The video is a few months old, but as not a huge number of people have seen it we thought it had to be worth flagging it up.

The car is a 1980 Porsche 935 K3 being driven round Laguna Seca (otherwise known as the Mazda Raceway) during the Rennsport Reunion last October. The K3 was the most famous of the 935s tuned by Kremer Racing, based in Cologne. 

Advertisement - Article continues below

>Read our Porsche 911 GT3 RS review

Weighing less than 1000kg (970kg was the minimum required by Group 5 rules) the 935 K3 had a twin-turbo flat-six putting out between 720bhp and 800bhp through a four-speed gearbox. The result was one of the wildest cars ever produced.  In 1979 a K3, in the hands of Klaus Ludwig, won a very wet Le Mans 24hrs, beating not only all the prototypes, but also a factory spec (although not factory-run) 935 into second place.

The man behind the wheel battling the boost is 32-year-old Leh Keen, who drives a 991 GT3R during his dayjob as a driver for Alex Job Racing. He also has a pretty amazing collection of 911 road cars, which you can see on his Instagram page

Skip advert
Advertisement

Recommended

Best Porsches – from Boxster GTS to Carrera GT and everything in between
Best Porsches
Best cars

Best Porsches – from Boxster GTS to Carrera GT and everything in between

Not all the best Porsches are 911s and not all the best 911s are GT3s. Here’s a list of the best cars to come from Stuttgart and Weissach in the moder…
31 Oct 2025
Ex-Porsche man returns home after stint at Ferrari and McLaren
Michael Leiters
News

Ex-Porsche man returns home after stint at Ferrari and McLaren

Michael Leiters, the ex-McLaren CEO named as new boss of Porsche
17 Oct 2025
Porsche officially puts EV plans on hold, developing new petrol models instead
Porsche 911 GT3 RS – front
News

Porsche officially puts EV plans on hold, developing new petrol models instead

It’s official. Porsche has delayed incoming EV models in response to poor demand, extending the lifespan of combustion-powered models in the process
22 Sep 2025
Kamm’s latest Porsche 912 restomod has less power than a basic BMW 3-series, but we don’t mind
Kamm 912T – front
News

Kamm’s latest Porsche 912 restomod has less power than a basic BMW 3-series, but we don’t mind

Kamm Manufaktur has unveiled a new Porsche 912-based restomod, and it could be the perfect antidote to the modern power race
7 Aug 2025
Skip advert
Advertisement

Most Popular

Living with the Toyota GR Yaris, a homologation hot hatch for £20k
evo Fast Fleet Toyota GR Yaris
Long term tests

Living with the Toyota GR Yaris, a homologation hot hatch for £20k

As the mystery of the GR’s true fuel tank capacity is solved, a new enigma emerges
27 Jan 2026
Cupra Leon VZ review – is this now the best hot hatch you can buy?
Cupra Leon VZ
Reviews

Cupra Leon VZ review – is this now the best hot hatch you can buy?

The choice of full-sized front-drive hot hatches now doesn’t include the Civic Type R. Can the Cupra Leon VZ take the top spot?
26 Jan 2026
Four pricey performance cars that make more sense to buy used
Depreciated performance cars
Features

Four pricey performance cars that make more sense to buy used

Depreciation: One buyer’s suffering is another man's saving, such as £65k off a nearly-new BMW M8 or £20k off a nearly-new Mercedes-AMG A35
22 Jan 2026