This 4 ply silicone air intake pipe has a smooth radial curvature, in comparison to the OEM pipe, to improve the air flow. This hose will fit the 61bhp and 71bhp Smart Fortwo 451 models (2008 onwards), both these models are naturally aspirated.

The Forge silicone hoses in this kit have been designed to include an expensive inner liner of modified silicone known as Fluorosilicone.
This means the hoses are suitable to be used with either modern long-life coolants, Organic Acid Technology coolants (O.A.T.) or air containing oil mist.
The construction of the hoses has been engineered to exceed that of the OEM fitments, and will enhance any engine bay both technically and aesthetically
The use of a Fluorosilicone liner ensures that Forge silicone hoses are the clear market leader.
Lifetime warranty