If you’re pushing serious power through your 6R80 and using a transbrake, you’re probably familiar with a critical weak point — the factory “B” drum. Under high apply pressures, the OEM drum can balloon out, taking your transmission case with it. The Bluestreak Billet Direct “B” Drum was engineered specifically to stop that from happening.

This isn’t just a stronger part — it’s a smarter design. Made to handle the demands of high-horsepower builds, the billet drum features an extended drive surface that allows for 2 extra clutches in the stack. That means you’ll get up to 9 frictions in total — compared to 7 with Exedy/GPZ drop-ins and just 4–5 in stock setups. More frictions = more holding power = a transmission that stays together under launch.

What’s included:

  • Drop-in billet “B” drum

  • Chamfered snap ring for center support (installed chamfer side up)

Key Features:

  • Prevents ballooning and case damage in high-pressure applications

  • Narrow, square-profile snap ring groove keeps everything locked in

  • Supports 9 clutch stack-ups for increased holding power

  • Drop-in install for 6R80 transmissions

  • Recommended use with 2.3mm snap ring from Exedy Stage 2 kit for best top plate fitment

Works on all 2015-2017 Mustang 6R80 transmissions