A 110mm titanium sports muffler provides a distinct sound compared to the standard "boxer rumble". Ownership & Buying Considerations

Beyond standard EJ20 care, owners should watch for "sticky" interior trim finishes common in this generation. Rare parts like the Recaro seats and S204-specific suspension components can be difficult and expensive to replace.

The S204 sets itself apart from a standard STI through several high-end upgrades:

2.0L "EJ20" DOHC twin-scroll turbocharged flat-four.

Enhanced rigidity with unique "performance dampers" developed by Yamaha and STI to reduce vibration and improve cornering. Exclusive Features

Features exclusive Recaro carbon-backed reclining bucket seats that are highly valuable and provide superior lateral support. The cabin also includes a numbered aluminum plaque.