SpeedCircuit

09/28/2026

Unveiling the new wrap from TSD Motorsports on our racecar just in time for the National championship.

09/03/2026

A rare find - This Evo X is completely stock aside from a catback exhaust (running the stock cat) and a 3 port BCS. 93 octane, conservative tune.

08/31/2026

Announcing our new customer service representative!

08/28/2026

Let's get this used Evo X Turbo kit sold!

Our used and open box items are sold as-is! No returns accepted on used or open box items. About 5,000 miles on the turbo. Good Condition. Included is 8374 turbo, 2 wastegates, 2 dump tubes, stainless steel lines and clamps for the wastegate, Intake, coupler and clamps for the intake, 3 inch downpip...

08/27/2026

Make your headlights shine bright again!

08/11/2026

4B11 MIVEC Deletes are back in stock in limited quantities!

This is a simple yet elegant solution for 4B11 owners who have experienced failures in the factory MIVEC exhaust cam gear housing. The stock cast aluminum housing are prone to failure due to increased valve spring seat pressure from upgraded valve springs. This replaces the stock phaser, but is fixe...

08/11/2026

Titanium Lug Bolts for Porsche on sale this week! Save 6%

Standard Ti: https://www.speedcircuit.net/products/bare-titanium-wheel-lug-bolts-for-porsche

Burnt Ti: https://www.speedcircuit.net/products/burnt-titanium-wheel-lug-bolts-for-porsche?_pos=2&_sid=d878c5f50&_ss=r

07/09/2026

Titanium Spark Covers On sale now!

https://www.speedcircuit.net/products/speedcircuit-spark-cover-for-evo-x-preorder

06/11/2026

Trying a G Series II G35-990 on our Evo X Turbo Kit.

05/15/2026