01
It leaks boost.
A split you can't see on a charge pipe bleeds pressure under load. The car feels flat, the tune runs lean, and you chase the fault for months.
Silicone Hoses LP
Subaru silicone hose kits
Your factory hoses are already failing. You just can't see it yet.
Twenty-year-old rubber goes hard, then brittle, then it splits — usually under boost, usually a long way from home. Roo Racing silicone hoses are a direct factory fit, built to outlast the car, and they don't perish.
4.6 out of 5 · 49 reviews on Trustpilot
Direct factory fit
Ships nationally
Campbelltown NSW
Fitment checked before dispatch
What's actually at stake
Perished rubber doesn't announce itself
Three ways old hoses cost you money, in order of how much.
02
It cooks head gaskets.
Soft, weeping coolant hoses are step one in the chain that ends with an EJ25 head gasket bill. Heat always finds the weak point.
03
It picks its moment.
Old rubber doesn't split in the driveway. It splits at the far end of a track day, or halfway up the Putty with no phone reception.
Why silicone
Not marketing claims. The actual difference between what's on the car now and what replaces it.
| Attribute | Factory rubber, 20 years on | Roo Racing silicone |
|---|---|---|
| Service life | Hardens and cracks with every heat cycle | Rated for 15 years of service |
| Heat range | 90°C to 105°C | −60°C to 145°C |
| Boost pressure | Rubber specified for factory boost, twenty years ago | 100+ PSI, four-ply reinforced |
| Fitment | OEM shape | Direct factory replacement. No trimming, no adapters, no universal bends. |
| Under the bonnet | Faded, swollen, weeping at the clamps | Holds its shape and its colour. Looks like the build deserves it. |
We only stock what we'd run in our own builds. Function over marketing.
The range
Four jobs, twenty kits
Every hose we sell does one of four things. Work out which job your car needs done, then pick the exact kit for your chassis below.
Coolant & radiator
Top and bottom radiator sets, Modine crossover hoses, heater matrix lines and full ancillary coolant kits. The ones that end in head gasket bills when they're left too long.
$120 – $510
Turbo & intercooler
Turbo hose kits and intercooler plumbing for EJ turbo cars. Where boost leaks live, and where a split you can't see costs you power and a lean tune.
$119 – $149
Vacuum, breather & EVAP
Complete sets for the rat's nest of brittle small-bore lines behind the manifold. Nobody wants to do this job twice.
$55 – $340
Induction
Air box hoses and blow off valve return lines. The small stuff that quietly goes hard and starts feeding your engine unmetered air.
$39 – $369Step one
Find yours
Every silicone kit we stock, grouped by the car it's built for. Prices are live — no part numbers to decode.
GC8 / GD / GG
WRX & STI 2001–2007
GR / GV
WRX 2008–2014 · STI 2008–2021
Silicone Top & Bottom Radiator Hoses$170
Silicone Ancillary Coolant Set$510
Silicone Turbo / Intercooler Hose Set
STI 2008–2014$125 Silicone Vacuum Hose Kit$140 Silicone Engine Breather Hose Set
Black$340 Roo Racing High Flow Inlet Hose
WRX 2008–2014 EJ255$296 Silicone Throttle Body Hose
WRX 2008–2014 EJ255$109
STI 2008–2014$125 Silicone Vacuum Hose Kit$140 Silicone Engine Breather Hose Set
Black$340 Roo Racing High Flow Inlet Hose
WRX 2008–2014 EJ255$296 Silicone Throttle Body Hose
WRX 2008–2014 EJ255$109
Liberty / Legacy
BE / BH 2001–2003
Car not listed, or not sure which kit you need? Send us your build — we'll tell you what fits before you spend a cent.
We'd rather sell you a hose than a story
While others charge a billet tax for flashy blocks of aluminium, we stock the parts that keep a Subaru on the road. Silicone hoses aren't glamorous. They don't add horsepower.
They stop a $200 job becoming a $4,000 one. That's the whole pitch.
Exclusive Fuji Racing distributorAustralia-wide. Parts you can't get anywhere else here.
1,100+ Subaru-only linesWe don't sell for Audi. We sell for this.
Campbelltown NSWReal workshop, real phone number, ships nationally.
Fitting them
Bolt on. And if it doesn't, ring us.
01
Pick your chassisYear and model is enough. We'll narrow it down from there.
02
We check it before it shipsRoughly 70% of what we sell is matched to the car, not pulled off a shelf.
03
Fit it in an afternoonHand tools, a drain pan and a couple of hours.
Not sure it fits?
Message us your chassis code and we'll tell you straight — a real person, who owns one of these too.
Before you buy
The questions we actually get asked
Will these fit my chassis without modification?
Yes. Every kit is a direct factory replacement for the chassis it's listed under — same routing, same bends, same clamp positions. Nothing here is universal hose cut to length. If your car has been modified around the plumbing, send us a photo first and we'll check it.
What makes these different from the cheap generic ones?
Mostly things you can’t see in a listing photo.
Silicone hose is cured twice. The second cure — hours in an oven at around 200°C — drives off the volatile by-products the first one leaves behind. It’s slow and it costs energy, so it’s the first corner cut on a budget line. A hose that skipped it looks identical when new, then bubbles, delaminates, goes tacky on the surface and loses tensile strength once it has seen a few hundred heat cycles.
Ply count gets quoted a lot and means less than people think. The reinforcement fabric between the layers is what actually holds pressure — a thick hose built on cheap polyester is worse than a thinner one built properly. Burst figures are the same story: they’re quoted cold and fall away as the hose heats up, so a big number on a listing can still describe a hose that’s marginal at operating temperature.
Ours are four-ply, rated to 100+ PSI and to fifteen years of service across −60°C to 145°C, and moulded to your chassis rather than cut from universal bends. Worth asking of anything you’re comparing them against — and if the listing won’t tell you, that’s usually the answer.
Do silicone hoses need different clamps?
We recommend new ones, for three reasons. Your existing clamps may not close down far enough on silicone — the wall thickness isn’t the same as rubber. If they’re twenty years old they may be seized, rounded off, or simply awkward to get a driver onto in situ, and you don’t want to discover that with the coolant already drained. And if you’re running more boost than factory, you want a clamp rated to hold at that pressure rather than hoping the original will. Worth doing while everything’s already apart.
Can I return them if I've ordered the wrong thing?
Yes, within 30 days, subject to our returns policy. Return postage is at your expense. If something’s gone wrong outside that — wrong part sent, or you’ve ordered in good faith and it isn’t right — ring us. We’d rather have a conversation and find an outcome than leave you stuck with a part you can’t use.
Replace it before it replaces your weekend
Ships nationally from Campbelltown NSW. Fitment checked before it leaves us.
4.6 out of 5 · 49 reviews on Trustpilot
Silicone hose kits
from $39 · direct factory fit
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