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Monday 9am - 5pm Tuesday 9am - 5pm Wednesday 9am - 5pm Thursday 9am - 5pm Friday 9am - 5pm

Slakker Racing Development

Name: Slakker Racing Development
Address: 7720 N ROBINSON Avenue, STE B7, Oklahoma City, OK, 73116, US
Telephone: +14055500207

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Slakker Racing Development- where Porsche performance meets unparalleled precision.Driven by our passion for excellence, our team breathes new life to each Porsche engine with a desire to exceed power, reliability and performance.

11/02/2026

Consider this your excuse to open another Porsche-related tab. 👀🏁

Explore the updated site at 👉 www.sr.dev

11/02/2026

You saw the numbers, now hear the pull.

The 996.2 Slakkerized 4.1L

11/02/2026

Built, Tested, and Slakkerized.

The 996.2 that started as a 3.6 and is now a 4.1L delivered 381.1 HP and 341.1lb-ft of TQ on our engine dyno!

From scored cylinders to a bullet proof 4.1L

10/31/2026

Litte by little, the 4.1L comes together.

From the crank carrier and case sealing to the lifters, cams and the final finishing touches. Enjoy the 996.2 engine assembly into a Slakkerized 4.1L

Next stop: the engine dyno!

10/29/2026

Freshly washed and looking better than ever.

The Speed Yellow 997.1 C4S was already a beauty when it arrived as a 3.8L, but now it is ready to head home as a Slakkerized 4.1L with 420.9 HP!!

Just taking a moment to appreciate this one before it heads home. 😎

10/28/2026

Another day, another disassembly!

10/28/2026

Making room for 4.1 liters.

This Porsche 996.2’s case hits the mill for machining to accept the larger Hartech closed-deck cylinders. Meanwhile, the heads get their refresh, with valve work and new valves going in.

The 3.6L → 4.1L transformation is taking shape.

10/27/2026

This one came in just in time.

From wrapped on a pallet to torn down for inspection, this Porsche 996.2’s 3.6L tells its story: scoring in cylinders 4 and 6, matching wear on the piston skirts, and wear on the rod bearings.

Next chapter: a Slakkerized 4.1L.

10/26/2026

360.6 HP and 316.5 LB-FT. 👀

That’s what this 3.9L Boxster S showed us during dyno testing with the larger throttle body and plenum setup. Without it, right around 350 HP.

For a lightweight 986… this thing is a proper sleeper.

10/26/2026

Time to find out what stopped this 3.6L. 🔧

Swipe through the teardown of our 2003 996.2 as we focus on the crank, main bearings, and rod bearings. One bearing had some serious wear, but thankfully, the damage was limited.

Next chapter: 4.1L Slakkerization. 🔥

Address

7720 N ROBINSON Avenue, STE B7
Oklahoma City, OK
73116

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Telephone

+14055500207

Website

http://www.sr.dev/

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