WATCH: F80 Powered E30 M3 is Pretty Nifty

We take a close look at the Honest Assembly S55 powered E30 M3. This beautiful E30 M3 is powered by the same power plant in the F80 M3. Classic styling with modern performance! The Honest Assembly build team was made up of amateur enthusiasts mentored by industry veterans. The result was a show quality build that made it to the SEMA show!

Follow us as we take a thorough walk through this amazing build and show you how this swap was accomplished.

Build Specs:


  • 550hp/560tq F80 M3 engine (S55B30) and 6 speed transmission – First swap of its kind in the world
  • BPM Sport – custom coding and performance tuning
  • 6 F80 coolers & pumps with custom plumbing, 4 fans, and controllers
  • CSF – charge cooler and heat exchanger
  • Diffsonline – Differential machined for 4 clutches, custom ramp angles, and a 3.38 ratio from
  • Ouroboros Fabrication – stainless steel oval exhaust


  • BimmerWorld – chassis consulting and components. Professional BMW race team and parts manufacturer/supplier founded while racing E30 M3s
  • Extensive hidden chassis reinforcements


  • F80 M3 ABS (converted to 4 channel), F80 brake master cylinder/booster (modified pedal box)
  • Essex Parts Sevices – AP Racing Radi-Cal calipers designed for the F80
  • MCS – 3-Way remote dampers and true rear coilovers
  • Custom subframes
  • SLR Speed – tubular suspension with custom geometry
  • Forgeline – centerlock wheels with offsets to accommodate customized suspension/brake components


  • Bare metal nut and bolt restoration with parts and consulting from James Clay of BimmerWorld and BimmerWorld Racing
  • Bodywork performed by nationally award winning team at Cars Remember When
  • Fabrication consulting by VW factory backed Project Baja @projectbaja and Flaherty’s Fabrication @eaflaherty
  • Carbon fiber spoiler and Gurney flap


  • Cardinal red napa interior
  • Napa black leather-wrapped dash, steering wheel, console, and pillars
  • New plastic, rubber, and components throughout



  • Justin Bruch
  • Parker Brown
  • Reece Cochran
  • Isaac Gesundheit
  • Peter Golledge
  • Zach Lagarenne (lead student builder)

Mentors That Made This Happen:

  • Dori Ahart – CRC Industries (lead believer and sponsor)
  • Geoff Barrett – BMW CCA (supporting mentor)
  • Mike Benvo – BPM Sport (tuning and coding)
  • Nate Bourgeois – Ouroboros Fabrication (exhaust)
  • James Clay – BimmerWorld (lead project tech advisor and parts sourcing)
  • Fox Chung – BMW CCA (supporting mentor)
  • Dean Coccaro – Zendex Tool and GoJak (made our 1.5 car garage usable space)
  • Ravi Dolwani – CSF Radiators (SEMA booth, cooling, and PR)
  • Dan Fitzgerald – Diffsonline (custom differential)
  • Erin Flaherty – Flaherty’s Fine Fabrication (oil pan and general awesome mentor)
  • Wyatt Gilbert – Motion Control Suspension (suspension consulting)
  • Jeff Jegelewicz – Cover Craft (developed custom cover)
  • Ryan Lindsley – BimmerSpeed (gets team out of jambs)
  • Sam Lopez – Gorilla Wraps (livery install)
  • Josh McGuckin – Gates and Project Baja (fabrication mentor)
  • Brian McGuire – (“make it work” mentor)
  • Alex McCulloch – Glen Shelly Auto Brokers (vintage BMW nut)
  • Jeff Ritter – Essex Brakes / AP Racing (brake tech consultant)
  • Cory Rowan – VisFire Creative (designer and project manager)
  • Steve Schardt – Forgeline Wheels (wheel fitment and design)
  • Scott Skrjanc – Lincoln Electric (welding supplies)
  • Andy Wall and Scott Morton – Cars Remeber When Restoration (body restoration)


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