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LEGO Nitro Muscle

Set #8146 · 2007 · 598 pieces · Substantial build

LEGO Nitro Muscle set 8146 instructions

Set Details

Set Number
8146
Name
Nitro Muscle
Theme
Racers
Year
2007
Pieces
598
Complexity
Substantial
Build Time
2-4 hours
Ages
10+
Type
Play-focused
LF
LegoFinder Editorial Team·Set data verified 2026·How we research sets

About LEGO Nitro Muscle

LEGO Nitro Muscle (set #8146) is a large, detailed build with 598 pieces from the Racers theme, released in 2007. The Racers line features racing vehicles and tracks, from tiny pull-back cars to complex builds. At 598 pieces, this is a substantial-level build with an estimated build time of 2-4 hours, suitable for ages 10+.

Set Highlights

  • 598 pieces at substantial complexity — a 2-4 hours build.
  • Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
  • Play-focused build with interactive elements designed for 10+ builders.

Who Is This Set For?

Gift for Ages 10+

The substantial difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 10+ age range.

Weekend Build Project

598 pieces with an estimated 2-4 hours fits comfortably into a focused afternoon or weekend session.

Expanding a Racers Collection

A solid addition for collectors building out their Racers shelf. Introduces parts and builds that complement other sets from the same line.

Build Tips

1

A five-minute sort by color or piece type before starting saves time hunting for specific bricks mid-step.

2

Follow the numbered steps in sequence — structural elements early in the build support everything that comes after.

3

For active play sets, key connection points (hinges, turntables, clip joints) can loosen over time — a small dab of LEGO's own tube clutch lubricant on the stud resolves most looseness without damage.

Finding Instructions

Building instructions for LEGO Nitro Muscle (#8146) are available as a free PDF on LEGO.com. You can also upload a photo of this set to LegoFinder to identify it and access the instructions directly.

Nitro Muscle FAQ

Related Reading

More Racers Sets

See all Racers

Also Released in 2007

All 2007 sets →

Similar Build Difficulty

Sets at roughly the same piece count and complexity tier — different theme and year, but a similar build experience.

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