SPRINGRATES

Only 25 road-legal examples were ever built. The Porsche 911 GT1 Straßenversion was a direct byproduct of Porsche's Le Mans campaign, a race car reverse-engineered into something barely street legal.

Mid-engine, carbon-bodied, and completely unhinged by modern standards. The fact that someone is using one as a weekend car is either the most irresponsible or most correct decision ever made.

Most coilover buyers obsess over brand and damping levels and completely overlook spring rate. That's the number that actually determines how your car compresses, recovers, and grips through every input you give it.

Spring rate is measured in kg/mm or lb/in and it controls ride comfort, body control, mechanical grip, and damping balance. The wrong rate doesn't just feel bad — it actively undermines everything else you spent money on.

The good news: brands like BC Racing, Riaction, Silvers, and Fortune Auto ship their kits with carefully validated defaults. For the majority of builds, those defaults are the correct starting point. Swapping rates without understanding motion ratio, damper valving, and chassis weight distribution is how you make a good kit worse.

Do whatever you have to do 🤷‍♂️

Double trouble 👀

Ready for summer ☀️

TEIN USA, Inc.

Your suspension choice starts with how you actually use your car. Both upgrades work. Only one is right for your build.

If you need any help deciding, our support team is here to help answer any questions. Link in bio to shop coilovers and lowering springs.