Description
Six silicone vacuum hoses, 6.6 ft of each, plus a 128-piece vacuum connector assortment. Every size and every fitting a stock engine bay uses, in one box — for air, vacuum and water only.
Six sizes and the connectors to join them
A stock engine bay doesn't use one hose size — it uses five or six, and the runs never come in the length you bought. This kit gives you the six sizes that come up most often, 6.6 ft of each, plus a vacuum connector assortment so you can join, split and step between sizes instead of ordering a fitting and waiting a week.
Why the 3 mm wall matters
Most cheap vacuum line is thin-wall. Under vacuum it flattens out of round, and at a tight bend it creases and stays creased. A 3 mm wall keeps the bore open and lets the hose take a bend without pinching shut — which is the difference between a boost gauge that reads true and one that reads high.
What's in the box
| Hose | Inside dia. | Outside dia. | Length |
|---|---|---|---|
| 1/8" | 3 mm | 9 mm | 6.6 ft |
| 5/32" | 4 mm | 10 mm | 6.6 ft |
| 3/16" | 5 mm | 11 mm | 6.6 ft |
| 1/4" | 6 mm | 12 mm | 6.6 ft |
| 5/16" | 8 mm | 14 mm | 6.6 ft |
| 3/8" | 10 mm | 16 mm | 6.6 ft |
Wall thickness 3 mm throughout. Plus 12 sizes of vacuum connector, 128 pieces in total.
Which size goes where
A general guide — always measure the port you're replacing before you cut.
| Size | Commonly used for |
|---|---|
| 1/8" (3 mm) | MAP sensor and small signal lines, boost gauge |
| 5/32" (4 mm) | Wastegate, blow-off valve, boost controller |
| 3/16" (5 mm) | Small vacuum actuators, carburettor and throttle body lines |
| 1/4" (6 mm) | PCV, charcoal canister, larger vacuum accessories |
| 5/16" (8 mm) | Idle air, brake vacuum assist lines |
| 3/8" (10 mm) | Coolant bypass, radiator overflow, larger intake runs |
What the connectors let you do
The connector set covers 12 sizes with straight, tee and elbow pieces, so you can join two lengths, run a branch off an existing line, or step from one bore to another without hunting for a matching barb. Keep the leftovers in the box — the next job always needs one you don't have.
Air, vacuum and water only — never fuel or oil
This is a silicone hose, and silicone swells and softens when it meets petrol or diesel. It is not a fuel line and must never be used as one. Run air, vacuum or water through it and it will last. Put fuel in it and it will fail — quietly at first, which is the dangerous part.
If you need a fuel line, use our rubber fuel hose instead. It is built for it.
Pressure ratings, in plain terms
Working pressure 43 PSI. That is what this hose holds all day, every day. Burst pressure 130 PSI at room temperature, 100 PSI at maximum temperature. That is the number it fails at. Never run it near that number — working pressure exists precisely so you don't have to.
Temperature range −76°F to 392°F (−60°C to 200°C).
Fitting it
- Cut square with a sharp blade, not with scissors.
- If the port is tight, dip the end in hot water for a few seconds.
- Use a hose clamp on anything that sees pressure.
- Don't reuse a hose that has been kinked and creased — it won't seal.
Shineyoo is a US-based seller. Every order is picked, packed and shipped from our own warehouse, and we answer messages within 24 hours.
