AS3 Performance silicone radiator hoses are a game - changer. Made from top - quality silicone with polyester reinforcement, they're stronger, more durable, and less likely to get punctured or damaged compared to standard rubber hoses. Many of our sponsored teams and riders use these hose kits in various race conditions. These hoses have a shiny gloss finish with AS3 Performance branding.
**Compatibility**: Fits 2001 - 2007 KTM 400 EXC, 2001 - 2007 KTM 450 EXC, and 2003 - 2007 KTM 525 EXC (all with thermostat bypass).
**Features**:
- Crafted from high - quality silicone with polyester reinforcement.
- All AS3 Performance hose kits are 3 - ply with a 4.5mm wall thickness.
- Pressure - tested up to 5 times the working pressure.
- Trusted by our sponsored mx and enduro riders at national and world levels.
- Designed exclusively for off - road and track use.
- Not for road or public highway use.
- Come with a 12 - month warranty from the purchase date.
- The hoses you see in the picture are exactly what you'll receive.
**Hose Clips**: Silicone hoses are softer than OEM rubber hoses. We recommend using our stainless - steel hose clips for installation. These clips are specially designed for silicone hoses, with smooth inners and rounded edges to prevent hose damage when tightened. [Click here to view the stainless - steel hose clip kit for this motorcycle].

Using these AS3 Performance silicone radiator hoses is straightforward. First, make sure you have our recommended stainless - steel hose clips. When installing, carefully attach the hoses to the appropriate parts of your 2001 - 2007 KTM 400 EXC, 2001 - 2007 KTM 450 EXC, or 2003 - 2007 KTM 525 EXC (with thermostat bypass). Tighten the hose clips gently to avoid damaging the hoses.
Keep in mind that these hoses are only for off - road and track use. Do not use them on public roads. Also, remember that they come with a 12 - month warranty from the date of purchase.
For maintenance, regularly check the hoses for any signs of wear or damage. If you notice any issues, contact us as soon as possible. And since these hoses are made of high - quality silicone with polyester reinforcement, they're quite durable, but still need proper care to ensure a long lifespan.