Upgrade your engine with the DO88 intercooler hose kit for the B58 Gen 1 found in the BMW M240i, 340i, and 440i!
BMW often uses plastic for OEM intercooler hoses. This choice, while cost-effective for the manufacturer, isn’t always suitable for managing pressurized air. As the plastic ages or your car’s boost increases, these hoses are prone to failure.
A faulty intercooler hose can result in a reduction in power, known as limp-home mode, or the car may shut down completely, requiring the hose to be replaced before it can restart. This could potentially leave you stranded.
There are many aftermarket intercooler kits available for the B58 engine, but in our opinion, most are poorly designed. Many competitors use a basic design: two hoses joined by a straight silicone hose and reducer. It’s clear they haven’t understood the importance of managing thermal movement in this system. This design is almost guaranteed to cause hose bursting problems because it doesn’t allow for movement due to temperature changes. A common solution is to tighten the clamps more, but in most cases, this will cause the hoses to fail because it deforms the clamping surface.
But at do88, we took a different approach. It was clear to us that the system needed a flexible connection between the two hoses that could handle thermal expansion/contraction. Our solution is a 3-humped, aramid-reinforced silicone hose. This hose design allows for movement in any direction without bending or stressing the connections. To further strengthen our design, the hoses are equipped with CNC-machined 6063 hose connector ends with a 3mm wall thickness. These hose connections won’t deform even with over-tightened hose clamps.
Our intercooler hoses not only improve durability, but also, of course, improve performance. We’ve designed our hoses with a larger diameter and smooth mandrel bends to improve performance. The lower hose measures 60 mm (2 3/8″) and the upper hose 76 mm (3″), effectively reducing pressure drop and reducing turbulence.
Our intercooler, which connects to the throttle body via its CNC-machined flange, has two 1/8 NPT ports suitable for methanol injection or outputs such as a boost pressure sensor. We also provide two 1/8 NPT plugs for those who choose not to use these ports.
Features:
Hose connection between the upper and lower hoses allows for movement, preventing the hose from popping out.
Specially designed, 3-bumped silicone hose, reinforced with high-temperature-resistant aramid fabric and stainless steel outer rings.
High-quality Mikalor hose clamps included. These clamps feature an internal ring inside the clamp that prevents hose damage and evenly distributes clamp pressure around the hose.
Better airflow and less backpressure for your engine!
23% greater flow than OEM, with 649 CFM at 150 mbar (2.17 psi) versus OEM 528 CFM.
CNC-machined hose connections with an internal diameter matching the hose provide a secure hose clamping surface against deformation.
CNC-machined MAP sensor boss, turbo, and throttle body connections.
CNC-machined 1/8 NPT connections (2x) are perfect for methanol injection or as outlets, such as for the boost pressure sensor.
If ports are not used, two 1/8 NPT plugs are included.
60mm (2 3/8”) and 76mm (3”) mandrel-bent intercooler hoses finished in a sleek black powder coat.
Does not interfere with the engine cover.
Includes all hardware and instructions for complete installation.