Spool B58/S58 Billet Race Torque Converter Upgrade - No Core Required!

Spool Performance B58/S58 Billet Race Torque Converter Upgrade

Introducing the Spool Performance X58 Billet Race Torque Converter, engineered for all B58 / S58-powered vehicles equipped with the ZF 8HP50, 8HP51, or 8HP76 transmissions.

Built to handle serious power, our X58 converter features:

• Billet drive plate

• Billet stator

• 3800–4000 RPM high-stall option

This upgrade is the ideal solution for enthusiasts pushing larger turbo setups and demanding maximum performance without sacrificing drivability.

High Stall Without the Headaches

One of the biggest complaints about other high-stall converters is poor street manners. We specifically designed the X58 to retain near-stock drivability, allowing smooth operation in stop-and-go traffic while still delivering the high stall speed needed to fully utilize your turbocharger’s powerband.

You get the best of both worlds:

• Aggressive launch capability
  

• Comfortable daily driving behavior

No Core Required

Unlike many competitors, we do not require your stock core. Our converter is fully compatible across all X58 models running the 8HP50, 8HP51, or 8HP76—making installation straightforward and hassle-free.

In Stock & Ready to Ship

We keep these units in stock and ready to go. Simply place your order, and we’ll prepare it for shipment right away.

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.