Build the Mopar Big Block Your Model Deserves
From factory-correct 383s to blown 440 street monsters—this complete RB engine system gives you everything you need to build it right.
Over 65 highly detailed STL files
Non-Member: $34 | Members: $22 Save 35%
Over 65 highly detailed STL files
Non-Member: $34 | Members: $22 Save 35%
Most Mopar engine builds fall apart in the details.
Wrong carb setup. Mismatched manifolds. Accessories that don't belong together. It's subtle—but it's what separates a decent build from one that actually looks right.
SSG58 fixes that.
  • This isn't just a collection of parts—it's a complete Mopar RB engine system designed so everything works together the way it should.
  • Start with a factory-correct 383...
    or build your way up to a blown 440 street monster.
  • No guesswork. No compromises.
With this pack you can build:
  • Factory 383, 413, 426 RB, and 440 engines
  • 426 Commando, 440 Magnum, and 440 Six Pack setups
  • Period-correct street builds or drag-inspired setups with dual carbs or Hilborn-style scoop
  • Full 6-71 supercharged big block builds
This isn't one engine—it's a full catalog from stock to all-out.
Modular Engine
System
Every component is designed to work together—mix, match, and build multiple variations from one pack.
Factory-Correct
Details
Correct carburetors, intake layouts, exhaust manifolds, and accessory drives for each configuration.
Street to Strip Progression
Start stock... then upgrade through period-correct performance setups all the way to a blown configuration.
Built for Real
Projects
Endless comination options mean you can use this pack across multiple builds—not just one.
Modular Engine
System
Every component is designed to work together—mix, match, and build multiple variations from one pack.
Factory-Correct
Details
Correct carburetors, intake layouts, exhaust manifolds, and accessory drives for each configuration.
Street to Strip Progression
Start stock... then upgrade through period-correct performance setups all the way to a blown configuration.
Built for Real
Projects
Endless comination options mean you can use this pack across multiple builds—not just one.
66 STL Files
Base RB Engines
  • 383 RB
  • 413
  • 426 RB
  • 440
Factory Performance Variants
  • 426 Commando
  • 440 Magnum
  • 440 Six-Pack
Factory-Correct Configurations
  • 2-barrel and 4-barrel induction setups
  • Correct carburetors and intakes
  • Factory Six Pack intake and carb setup
  • Correct exhaust manifolds:
    log-style and hi-po cast
Period Performance Parts
  • 6-71 roots-style supercharger setup
  • Dual-carb configuration with Hilborn-style scoop
  • Designed for classic street machine style builds
Everything you need to build it right—ready to download instantly.
One file pack purchase — endless Mopar muscle builds
Explore the details up close before you download
Blown 440 - Complete
383 with A/C and Power Steering - Exploded
Aftermarket Edelbrock Intake
Option 1
Buy This Pack
  • Instant Access to SSG58
  • One-time purchase
  • Yours to keep and print for forever (personal use)
$34
Complete Your Order Below
Option 2
Join Scale Speed Garage Pro
  • Get this pack for 35% less
  • 50+ new STL files every month
  • Access the full archive store and get member pricing on all past packs
  • Get access to the full library of videos, calculators, and more
 Yes - Go SSG Pro
You're getting instant access to SSG58!
 Unlock the complete RB Engine system
add SSG58 Overdrive Pro/Elite Bonus to your order
You'll get an additional 32 STL files, including:
  • Adds Sonoramic 413 and Max Wedge configurations to the SSG58 RB system
  • Includes race-evolution parts for late '60s–early '70s performance builds
  • Built for correct, aggressive, period-accurate RB builds
  • Integrates seamlessly with the base pack
Most builders choose to add the Overdrive pack for maximum build possibilities.
You can spend hours trying to piece this together...

or download a complete system that just works.

Build it right the first time.

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$ 34.00 USD