Description
Product Description
Here we present FMCT5, a twin catch can and coolant expansion tank system. This design has been subject to a vast amount of development and is a one of a kind product in the marketplace.
The FMCT5 is a direct replacement for the OE coolant expansion tank. The CAD laser cut alloy construction is skilfully welded at Forge UK HQ. The expansion tank has a level indicator inside the filler neck, to make topping up easier, we have also machined a cap cover that slots over the top of the OEM cap to add to the premium look.
The twin catch can system is the definitive solution to effectively reduce sludge and carbon build up, in turn allowing the engine to both breathe and perform more efficiently. It can therefore be viewed as a genuine performance enhancing product and one, we recommend, particularly if you are planning more advanced power tuning in the future.
Our system filters both PCV and intake breather systems to help keep your engine clean from harmful contaminants, including oil deposits, unused fuel vapours and moisture, which would ordinarily make their way back through to the inlet of the engine. All of this is now collected in the catch cans.
There is a dip stick for each tank to measure the amount of deposit caught, this opening can also be used to pump out the captured contaminants or alternately you can use the drain plugs at the bottom of the tanks.
As with all Forge Motorsport products we have used superior braided hoses which are internally constructed from anti-static smooth fuel resistant nitrile rubber. This is combined with an outer cover made from reinforced stainless-steel wire braid (a Forge specialty), specifically a partial inner braid and a full cover outer braid. We developed this complex arrangement in order for the tank to be resistant to both pressure expansion and vacuum collapse, and also to enable the kit to function within a clearly defined temperature range – 54°C to +150°C (-65°F to 300°F).
The FMCT5 is available in raw aluminium finish or our stealthy textured black powder coat finish.
Highlights
- A drain plug for ease of emptying
- Coolant level indicator
- Integrated dipstick’s for simple level inspection
- CNC machined anodised coolant cap cover
- Premium Quality stainless steel reinforced oil resistant hoses with black external braiding
- Inner tube is constructed from anti-static smooth fuel resistant nitrile rubber
- Outer cover is constructed from reinforced Stainless-Steel wire braid consisting of partial inner braid & full cover outer braiding which is resistant to pressure expansion and vacuum collapse
- Temperature Range: -54°C to +150°C (-65°F to 300°F)
- The engine cover can still be fitted after installation
- Installation is straight forward with all necessary fittings and Forge detailed instructions included.
Check your vehicle compatibility: Click here
Please Note: In line with our policy to constantly review, revise, and improve our product range, the appearance of the product you receive may differ from the one advertised.
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Compatible Vehicles
Instructions

Hyundai i30N/Veloster N/Kona N Dual Catch Can and Expansion Tank
Warranty
All Forge Motorsport products come with a limited lifetime warranty. All warranty claims must be accompanied by the original proof of purchase to enable us to help you. Failure to supply this proof will result in your claim or enquiry being denied.
For further information, please contact our customer service team.
Do not use aggressive (acidic) car cleaning products, particularly traffic film remover solutions or shampoos to clean your intercooler, radiator or oil cooler. The use of these products can damage Forge Motorsport cooling systems and invalidate your warranty. These are often found at car washes. A light, warm, soapy solution (free of harsh acidic cleaning compounds) should be used to clean you cooler and thoroughly rinsed away. We recommend that you should inspect your product on a regular basis for bent and/or crushed fins. Any bent fins should be carefully straightened to allow ambient air to pass through the core face. At the time of installing your Forge radiator, an approved coolant must be used and added to the coolant system. Be sure you never mix coolant and always use distilled water.
Shipping
Shipping
Shipping Charges & Services
We will contact you after your order is placed to advise of available shipping services and costs and to take payment from you.