On a mid-engine McLaren, the charge-air system runs two turbochargers mounted close behind the cabin, two intercoolers fed by them, and a chain of hose and hard pipe that carries the compressed air forward to the throttle bodies. The cooler cores themselves are usually robust. What ages is the rubber around them, because those parts take every heat cycle, every pressure pulse and every small movement of an engine that sits only a short distance from the driver's back.
That matters when you are diagnosing a fault. A car that loses boost, smells faintly of hot rubber, or shows a thin film of oil mist around a joint is usually telling you about a hose, not about a cooler core. Changing the core first is an expensive way to learn that lesson.
The 570S uses one hose to the left intercooler and one to the right, and the two are moulded differently. Our 570S turbo intercooler hose listing is written per side for exactly that reason.
Compressed air leaves the turbocharger hotter than most owners expect, and it arrives at the intercooler carrying oil vapour from the crankcase breather. That combination is hard on rubber. Heat softens the compound, the vapour works into the surface, and repeated expansion and contraction slowly breaks the bond between the reinforcement layers and the outer skin.
The second load is mechanical. Under acceleration the engine rocks in its mounts, and the plumbing has to absorb that movement without pulling on a cooler end tank or a throttle body. A hose that is too stiff passes the movement on to the weakest joint; a hose with the right wall and reinforcement flexes instead.
Burst pressure is therefore not the whole story. A hose can hold pressure on a bench and still leak in the car, because the real test is pressure plus temperature plus movement at the same time.
Access shapes the diagnosis. The rear deck and the engine covers have to come off before you can see much, so it pays to know what you are looking for before you start removing panels. Inspect above and below every joint rather than only the hose body, because a clamp that has bitten into the reinforcement will weep along the sleeve.
Oil residue is the most useful clue. A charge hose that has been breathing vapour for a long time will feel tacky and will show a dark ring at the clamp line. If the residue reaches the cooler end tank, clean it and re-check after a few drives instead of assuming the cooler has failed.
Finally, check the hard pipe and its mounting brackets. A cracked bracket lets the whole assembly move, and no hose will survive that for long.
Replacement hoses for this kind of car are normally built from silicone rather than rubber, because silicone holds its shape over a wider temperature range and resists oil vapour better. Reinforcement matters as much as the compound. Layers of fabric or aramid-type fibre carry the pressure load, and the number and orientation of those layers is what separates a hose that lasts from one that swells and delaminates.
For a car used on the road with occasional track time, a multi-layer reinforced silicone hose with a smooth bore is the sensible default. You can see how these are built and what finishes are available on our performance silicone hose pages.
Colour and branding are cosmetic, but wall thickness is not. A hose that is visibly thinner through the moulded bends will collapse under vacuum on the intake side and balloon on the pressure side.
Most charge-air failures on the road are leaks, not bursts. A rolled or damaged bead on the hard pipe lets the clamp slide off under pressure, and a clamp that is overtightened cuts the reinforcement. Both look like a hose problem and both are really joint problems.
Use a clamp that matches the hose diameter and spreads its load evenly around the sleeve, and seat it behind the bead where the pipe gives it something to grip. Where the original assembly used a spring clamp, a worm-drive clamp of the correct width is usually a reasonable substitute provided it does not pinch the hose.
Pressure-test the assembly after fitting. A joint that holds cold air at idle is not proven until it has held hot, pressurised air under load.
The rear structure and the heatshielding make this a job that rewards patience. Label the fasteners as they come off, because the panels around the engine bay are not all the same length, and photograph the routing before you disturb it. The shape of the moulded hose is its own fitting instruction.
Take the opportunity to inspect the shielding while the area is open. A blanket or shield that has been cooked and is breaking up will keep heat-soaking the new hose, and the same fault will come back.
If the original shape is no longer available, or you want a hose that suits a modified routing, we can build to a sample or to a drawing. Send either one and an engineer gauges the dimensions, checks the material and produces the tooling, then moulds a sample for you to test before anything goes further.
We have been building this kind of work since 2009, and our workshop handles one-off patterns as readily as repeat runs. The range is set out on our customization page, and our titanium fab components section shows the same approach applied to metal parts.
A charge hose for a mid-engine car has to be right on the first attempt, because there is no easy way to modify it once the engine bay is back together. These are the points that decide whether the part fits.
Tell us the model, the side and what the car is used for, and we will confirm the specification before tooling starts. If you are unsure which variant you have, our shop by vehicle pages and the intercooler range are the quickest way to narrow it down.
