New Large Mouth Fuel Tank Gas Cap
Fits 43-66 MB, GPW, M38, M38A1

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New Large Mouth Fuel Tank Gas Cap
Fits 43-66 MB, GPW, M38, M38A1
New Replacement Fuel Tank Gas Cap

Great reproduction gas cap in the original large mouth style. Help keep your military vehicle original. Guaranteed to fit.

43-45 MB
43-45 GPW
50-52 M38
52-66 M38A1
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Availability: In stock

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Questions: 1946 Cj 2a, seems to need a large mouth gas cap. Maybe tank from a different vehicle. Whats the outside diameter of the large mouth gas cap? dont want to order the wrong cap.
Question By: mark mcnally on Aug 3 2017 4:40 PM
They are 4.5" OD
Answer By: Willys Jeep Parts Tech on Aug 3 2017 9:41 AM
Questions: Does this gas cap come with a gasket or o-ring on it already?
Question By: Caden Rianda on Jun 12 2017 6:32 AM
Yes it comes complete with gasket.
Answer By: Willys Jeep Parts Tech on Jun 12 2017 5:42 AM
Questions: Are there any locking gas cap options out there for a 1953 M38A!?
Question By: Mike J on May 1 2017 4:47 PM
Sorry, there are not.
Answer By: Willys Jeep Parts Tech on May 1 2017 10:46 AM
Questions: My 1951 M38, apparently, had its tank replaced with a CJ tank (smaller filler neck) at some time in its life. Is it possible to obtain just the 4" fill neck to have a shop weld that in place and properly adapt this tank to my military-spec vehicle? Would your tank supplier be willing to sell that important part separately through you?
Question By: Rick Williams on Jul 21 2016 5:25 PM
Sorry, you cant get just a spout for it. You would have to fabricate that locally.
Answer By: Willys Jeep parts tech on Jul 21 2016 10:28 AM
Questions: What are the measurements of the gas cap?
Question By: Darren on Sep 18 2011 12:00 AM
It is 4.5 OD
Answer By: Willys Tech on Sep 19 2011 12:00 AM