S13 Silvia / 180sx Replacement Overflow bottle
S13 Silvia / 180sx Replacement Overflow bottle


S13 Silvia / 180sx Replacement Overflow bottle

Sale price$69.00 AUD
SKU: s13x-oflw
In stock

What is a Backorder?

Q: What is backorder?

When a product is on backorder, it means that we have sold out and we are opening a back order due to popular demand. This is essentially a queue, when new stock arrives from production, weโ€™ll send your order.

Q: Will items in my order that are in stock be shipped out first?

We will send your order altogether once your backorder item is ready! You may wish to place separate orders if you want an item before the other is due back in stock.
Pickup available at Sunshine West, VIC 3020 Usually ready in 2 hours

S13 Silvia / 180sx Replacement Overflow bottle

Sunshine West, VIC 3020

Pickup available, usually ready in 2 hours

Unit 11/94 Boundary Road
Sunshine West VIC 3020


Free Shipping on orders over $250

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Product enquiry

One of the most common problems with S13 silvias and 180sx's is cracked overflow bottles. GKTECH have made these to the highest standards and to be a direct replacement of your standard overflow bottle.

Our overflow bottles are stronger than factory and are guaranteed to last the test of time!

- 100% direct replacement of your standard overflow bottle
- Fits both S13 and 180sx/240sx with any engine setup
- Stronger than the factory overflow bottle. GUARANTEED!


Do you sell aluminium overflow bottles?
No, we only sell the products listed on our website. If it's not listed on here, then we don't sell it. Sorry.

Do you sell overflow bottles for my car?
Please refer to the confirmed vehicle list in the item description. We do not sell any items that aren't listed on our website and if we haven't confirmed fitment on your car, then we don't know if it will fit or not.

Do you sell washer bottles?
No, we only sell the products listed on our website. If it's not listed on here, then we don't sell it. Sorry.

How long does this overflow bottle take to install?
It shouldn't take you longer than 5 minutes to remove your old overflow bottle and put in this new one.

What's the advantage of this overflow bottle over my standard Nissan item?
The standard Nissan item is notorious for breaking apart. The GKTECH overflow bottles are much thicker than the standard Nissan item and will last a lot longer.



S13 CA18 180SX
S13 SR20 180SX


Install Videos

Customer Reviews

Based on 88 reviews

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Gianfranco Gazzabin
very good service

very good service, very good quality of material, very good shipping in fast time, my Nissan S13 200SX thanks a lot

Abu Kassama
it works

it was ordered to replace the one in my car i just got and it fit perfectly and works

Troy C
Keeping it oem

Keeping my S13 HB stock so this was a no brainer. Plastic is definitely thicker than oem and a better price. Mounts up in a couple minutes. You can even use your original oem cap it you want.

Luke Kosewski
OEM fit & finish at a fraction of the price

Your 30-year-old Nissan coolant expansion tank is cracking and pieces of plastic are everywhere. That's not unexpected, but you go to Nissan for a replacement and they want $200. Hmm... enter GKtech. For a quarter of the price you get a part that fits (fasteners, hoses, hell, even the lid if you want, though it comes with one so need for that). Unlike other aftermarket parts it's not gharish, just a subtle "GK Tech" imprinted into the plastic. Very happy with it and looking forward to another 30 years of my 240sx. Thanks GKtech team!