Loading... Please wait...
  • Image 1

Billet VW/Audi 1.8T / 1.9TDI / 2.0 Upper Radiator Hose 4Y

4.10 LBS

Product Description is proud to announce the long awaited release of our new BILLET VW/Audi 1.8T / 1.9TDI / 2.0 Upper Radiator Hose 4Y Pipe to replace the OEM Audi/VW plastic 4Y P/N 1J0-121-087C (1J0121087C)

This part is found in OEM upper radiator hose P/N’s :

1J0-122-101BL (1J0122101BL) 
1J0-122-101R (1J0122101R) 
1J0-122-101A (1J0122101A) 
1J0-122-101B (1J0122101B) 
8NO-122-101A (8NO122101A) 
8N0-122-101B (8NO122101B) with no thermo switch.

The flimsy plastic OEM 4Y junction located in the upper radiator hose quickly dries out and becomes super brittle. If you look at it wrong, it will snap and leave you stranded. Or worse, turn your high dollar motor into an overheated paperweight. Our BILLET ALUMINUM version is made from CNC'd 6061-T651 aircraft grade aluminum. Our version is also machined to accept ORB (o-ring boss) to Nipple as well as -AN to ORB fittings for each of the 4 ports. This allows owners to use the factory hoses, or switch to complete -AN hoses for the holy grail of all cooling systems! Each fitting is supplied with the appropriate viton O-ring on the ORB end. The ports are sized as follows : 

Upper (reservoir return) : -4AN
Lower (oil cooler outlet) : -8AN 
Left /Right Main Radiator outlets : -16AN 

This part comes as shown in the pic with all the fittings for OEM radiator hoses.  Customers may choose to order this part as the main body only (with no fittings). If you would like the part WITHOUT the standard radiator hose fittings, please contact us.  Please note the parts will be shipped unassembled - you can use a pair of channel locks with tape or other insulation to tighten down the fittings. 

This Part Fits : 
VW Golf/Jetta/New Beetle with 1.8T / 1.9TDI, 2.0 1999-2012 with upper radiator hose 4Y adapter P/N 1J0-121-087C (1J0121087C) 

Audi TT 1.8T 2000-2006 with upper radiator hose with 4Y adapter P/N 1J0-121-087C (1J0121087C)

Applicable Engine Types 


The fittings and ports are machined by specifically to fit the vehicle radiator hose. They match the OEM length and diameter, and thus will not cause the fitting to kink the OEM hoses. The ports adhere to the SAE specifications in all regards with the exception of length, which has been shortened. This was necessary due to the tight space constraints, which this part fits into. 

This means that customers wanting to utilize -AN hoses rather than the OEM rubber hoses will need to use -AN to ORB adapters, in which the ORB side has been shortened to fit correctly into this machined part. 

Product Reviews

  1. Billet 4Y radiator hose connector 5 Star Review

    Posted by on 12th Aug 2015

    Great looking and functional product! much better than the brittle oem piece. My oem piece I replaced only 2 years ago and already is leaking.... I am looking forward to installing this high quality and nice looking part :)

  2. very well made product 5 Star Review

    Posted by on 19th May 2015

    Stop buying plastic oem parts buy these parts instead. Audi and vw should stop stealing money from people by sealing their inferior products.

  3. Great quality built product 4 Star Review

    Posted by on 29th Oct 2014

    Beautifully made replacement part for the crappy plastic OEM that always cracks and breaks. It's a little pricey, but Gruven is the only ones I know who make it so they can charge whatever they want and I'll still buy it. Also the larger hose fittings could stand to be a little longer. I had to purchase a smaller width hose clamp to clamp it with. Last thing... It's a tad bulky compared to OEM, but it's pretty so it just draws attention to itself I guess. Overall I'm very happy and I won't need to be replacing this piece ever again.

Find Your Part

Recent Updates

Newsletter Sign Up