An in-house developed hose kit from do88 that replaces the car's original throttle body preheating hoses! These hoses are made exclusively from high-quality silicone for the best durability and finish. With three to five layers of reinforcement, depending on the hose's inner diameter, the hoses withstand high pressures and temperatures over a long period. The original is made from rubber, which not infrequently cracks as it dries out. This is the solution to that, and it considerably improves the appearance as well! There is no performance difference between the various colours. All original part numbers are given as reference numbers only.