Vacuum leaks are tiny problems that cause big headaches—rough idle, hunting revs, odd ECU codes, boost spikes, and gauges that never read the same twice. Most of the time, the culprit is an old rubber line that has become hard, brittle, or split due to heat and age.
Our Exoracing black silicone vacuum hose is the simple, long-term fix. It restores an airtight path for the signals your ECU, boost controller, wastegate, and MAP sensor rely on, so your tune behaves, idle settles, and your readings become consistent again.
Built specifically for the engine bay, silicone stays flexible next to turbos, radiators, and headers, and it resists ozone and UV that quickly age standard rubber.
Available in 4mm, 5mm, and 6mm inner diameters, it slips cleanly over common barbed fittings for a snug seal and a tidy, OEM-plus look.
It’s ideal for boost reference lines, MAP sensor feeds, blow-off/recirculation valve signals, fuel pressure regulator references, and gauge lines—anywhere you need a reliable vacuum or low-pressure signal (just note it isn’t designed for fuel or oil contact).
To suit nearly every automotive application, we supply Exoracing silicone vacuum hose in three convenient lengths: 1m, 3m, and 10m.
Replacing old lines with quality silicone also makes future diagnosis easier. A continuous, clearly routed length is simple to trace, allowing you to spot issues at a glance instead of chasing hidden hairline splits.
Fit it once, enjoy a cleaner bay and more reliable running, and drive with confidence—backed by our Lifetime Warranty against manufacturing defects.
Purchase Includes
- Exoracing Black Silicone Vacuum Hose Length
- Exoracing Lifetime Warranty
Features
- Flexible, kink-resistant extrusion for most engine bays
- Works across typical automotive extremes (approx. −20 °C to +240 °C)
- Holds a full vacuum for reliable sensor and actuator signals
- UV/ozone-resistant for long service life
- Clean black finish to match OEM or stealth builds (logo only on one side)
- Available in 4mm, 5mm, or 6mm ID
- Available in 3 lengths: 1m, 3m, 10m
- Covered for life by Exoracing’s Lifetime Warranty
Installation Guide
- Plan the route to avoid sharp edges and high-heat sources whenever possible.
- Measure, then cut cleanly with a sharp blade or scissors.
- Push the hose fully onto the barbed fittings. If necessary, warm the hose slightly to achieve a snug fit.
- Secure with appropriate clamps (spring clips, cable ties, or small worm-drive) on pressurised or vibration-prone joints.
- Start the engine and perform a leak check (spray soapy water or monitor live vacuum/boost readings).
- Re-inspect after your first drive to confirm secure seating.
Heat Protection (Recommended)
If your vacuum line needs to pass close to high-radiant heat sources—such as a turbocharger, downpipe, exhaust manifold, or a tightly packaged radiator area—slip our Exoracing Silicone Heat Sleeve over the hose to dramatically reduce radiant heat and minimise the risk of softening or melting.
Standard silicone vacuum hoses are rated to a maximum of around 240 °C, but local hotspots in the bay can exceed this under sustained loads. The heat sleeve adds a reflective/insulating barrier that lowers surface temperatures, preserves hose elasticity, and extends service life.
Sizing tip: Choose a sleeve internal diameter that is just larger than the hose’s outside diameter (see specs below).
Cover the section nearest the heat source, keep as much clearance as possible, and secure the sleeve ends with heat-resistant ties or clamps. For routes within ~50 mm of a turbo or downpipe, sleeving is strongly recommended.
Technical Specifications
| Material: | High-temperature silicone (VMQ), unreinforced extrusion |
| Colour: | Black with white Exoracing logo |
| Inner Diameters: | 4mm, 5mm, 6mm |
| Roll Lengths: | 1m, 3m, 10m |
| Nominal Wall Thickness: | ~2–3 mm (varies by ID) |
| Approx. Outside Diameter: | 4mm/5mm/6mm ID → ~10mm/11mm/12mm OD |
| Temperature Range (guideline): | −40 °C to +240 °C continuous |
| Service: | Vacuum/low-pressure signal lines; not compatible with fuel or oil |
| Working pressure: | 0.3MPa/43.5PSI to 0.9MPa/130.5PSI |
| Hardness: | 70 Shore Rating |
Notes
- Silicone vacuum hoses are not suitable for exposure to petrol, diesel, or oil; use fluorosilicone-lined or PTFE hoses for those fluids.
- Avoid tight bends that could kink; use clips or elbows if a small radius is unavoidable.
- Lengths ordered in multiple metres are supplied as a continuous run where possible.
- Covered by Exoracing’s Lifetime Warranty against manufacturing defects
FAQ
Can I use this for boost (positive pressure) lines?
Yes—for signal and reference lines (e.g., wastegate, boost gauge). It is not intended to replace reinforced charge/coolant hoses or for use in high-pressure applications.
Is silicone vacuum hose fuel-safe?
No. Standard silicone degrades when exposed to fuel and oil. For fuel or oil contact, choose fluorosilicone-lined or PTFE hose.
Will it handle a full vacuum at high temperatures?
Yes—this hose is designed for full vacuum across typical automotive temperature ranges noted above.
What size should I pick?
Match the inside diameter to the fitting’s outside diameter. If the barb is between sizes, choose the smaller ID for a tighter fit and use a clamp.
Can I use it for brake booster lines?
We don’t recommend it. Brake systems are safety-critical; use only OE-spec reinforced booster hoses.
Exoracing Ltd offers a lifetime warranty against manufacturing defects on this Exoracing Ltd product for peace of mind and a risk-free buying experience! We have 100% faith in our products and know they are of the highest quality, so where most manufacturers offer a year, we decided to offer a massive lifetime warranty.
Exoracing Ltd lifetime warranty will cover repairing, replacing, or store credit to the same purchase value if the part has since been discontinued, at our discretion, for any Exoracing Ltd product that is found defective.
Exoracing Ltd's lifetime warranty policy will only apply if the product was purchased through ourselves or an officially licenced distributor in our network.
This warranty policy is non-transferable and all claims under this policy must be accompanied by the original receipt of sale.