Overview
The HPI Racing Underhead #1444 is a genuine HPI replacement underhead for the Nitro Star S-25 engine. It's the inner head section that sits under the cooling head.
Replace a worn or damaged underhead during a rebuild to get the engine back to factory spec.
Key Features
- Genuine HPI Racing engine part
- Made for the Nitro Star S-25 engine
- Direct OEM replacement
- Used with the upper cooling head
Performance Benefits
- Restores factory head fit
- Helps the engine run consistently after a rebuild
- Cheaper than a complete head assembly
Usage Notes
- Fit a new head gasket/shim when reassembling
- Tighten head screws evenly in a cross pattern
- HPI heatsink heads (e.g. #15143) are related parts, sold separately
Technical Specs
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Brand: HPI Racing
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Item No.: 1444
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Engine: Nitro Star S-25
What's Included
Fitment
Compatible RC vehicles: HPI Nitro Star S-25 Engine.
Summary
- Replacement underhead for the Nitro Star S-25
- Genuine HPI engine part
- Restores factory head fit
