Traxxas TRX Pro.15 to TRX 2.5/2.5R upgrade kit for Nitro Rustler Nitro Sport (incl. SE) and Nitro Stampede

The Traxxas TRX4400 upgrade kit makes it straightforward to convert TRX Pro .15-powered 1/10 models to the TRX 2.5 or 2.5R engine setup. Major components come pre-assembled and pre-adjusted for a quick, bolt-on installation, and detailed instructions are included to guide the process. It’s a genuine Traxxas solution designed to unlock the performance of the TRX 2.5 Racing Engine.

What’s Included

• Header
• Pipe
• Pipe hanger
• Coupler
• Linkage
• Additional components specific to each model

Key Features

• Converts TRX Pro .15 models to TRX 2.5/2.5R specification
• Factory pre-assembled and pre-adjusted components
• Direct bolt-on installation with detailed instructions
• Genuine Traxxas hardware for reliable fit and performance
• TRX 2.5 Racing Engine (model 5207) sold separately

Tech Specs

• Weight: 147.42 g (5.2 oz)
• Shipping Weight: 0.15 kg (0.33 lbs)
• Product Height: 159 mm (6.25 in)
• Product Width: 51 mm (2 in)
• Product Length: 178 mm (7 in)
• Scale: 1:10
• Age Recommendation: 14+
• Colour: Grey
• Power Source: Nitro

Suggested Compatibility

Based on the product designation, suggested compatibility includes Traxxas Nitro Rustler, Nitro Sport (including SE), and Nitro Stampede models originally equipped with the TRX Pro .15 engine.