r/Autos • u/DirtLegal • 1h ago
1997 Mercedes S300 Turbodiesel build aiming for 350–400 hp, roughly twice its factory power
A guy is building a ‘97 S300 Turbodiesel for SEMA and aiming to roughly double its factory power.
Stumbled on this build and I kind of love the idea of it.
A W140 S-Class that still looks like a comfy, understated ’90s Benz, but with way more power than anyone would expect.
It’s Kanan Gubins’ 1997 S300 Turbodiesel, and stock, the OM606 3.0 inline six made around 175 hp and 243 lb-ft. He’s not swapping anything in either, since the goal is 350~400 hp out of the same engine.

The plan so far is a bigger HX35 turbo, custom piping, and exhaust work, but obviously a bigger turbo alone won’t get you there. It’ll need enough fuel, the cooling has to keep up, and the trans has to actually survive it. Nothing’s been dyno’d yet, so 350~400 is the target, not a result yet.

It’s also getting fresh paint and rust protection. Honestly, I hope they keep the stock W140 look as much as possible. That’s the whole appeal for me: a Mercedes that still looks like a comfortable sedan but has a lot more power than you’d expect.
The backstory is the best part though. Kanan found the car in Latvia, where his dad was born, drove it about 1,200 km to Vienna, then shipped it to LA as a birthday surprise. Apparently they’d been talking about this exact model for years, and it even shipped out of the same German port his dad left from when he emigrated to the US in 1950, and it showed up the day before his dad’s birthday.
Now it’s getting built for an unveiling at SEMA 2026 in Vegas. What’s been shown so far looks promising. Really curious what it ends up making and how much of the classic S-Class look survives.
If anyone’s going to SEMA 2026, keep an eye out for it. Would love to hear what it’s like in person.