R304 Silencer Compact Racing Exhaust For Performance Gains
R304 Silencer Compact Racing Exhaust For Performance Gains
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Product Overview
The PRO CIRCUIT R304 Silencer is a compact, race-tuned muffler delivering optimized power and sound control for closed-course racing, with tool‑accessible hex screws for fast re-packing.
Key Benefits
- Lightweight design improves throttle response and handling.
- Easy hex-screw access for quick maintenance and re-packing.
- Tuned for race performance and durable construction.
- Reduces noise while preserving power delivery.
Specifications
| Voltage | N/A |
| Current | N/A |
| Torque (mounting bolts) | 6 Nm |
| Dimensions | Length 310 mm × Ø 60 mm |
| Weight | 420 g |
Compatibility & Installation
Fits select 85cc motocross models (2025 Gas-Gas MC 85 17/14, 2025 Gas-Gas MC 85 19/16, 2025 Husqvarna TC 85 (17/14), 2025 KTM 85 SX (17/14)); recommended for closed-course racing—bolt-on with hex screws, quick re-packable.
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

