Buy Now, Pay Later! Starting at 0% APR
On orders over $100
100% Money Back on Select Parts
Product images
Product Media
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small (Part Number: )
Mishimoto 1.3 Bar Radiator Cap Small
Write a Review | 3 Q&As
Part # MMRC-13-SM
msrp: $25.00

In stock! Ships same day
Universal part

Features & Product Details

The Mishimoto 1.3 Bar Radiator Cap is available for those of you looking to get a quality OEM replacement. This is a high-pressure oil cap rated at 1.3 bar to keep the coolant flowing within the system.

Note that it will fit most 31-32mm fill necks. 


Brand: Mishimoto
Opening Point: 1.3 Bar
Mfgr. Warranty: Limited Lifetime
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
RallySport Guarantee



Be the first to write a review


  • Q: Subaru Impreza STI 2006  .4 days ago

    I have a Mishimoto aluminium radiator in my 2006 STI. Does this cap go on the Mishimoto radiator or the expansion tank? It this cap a two-way or a single valve? There are 2 questions regarding this under this product but both have contradicting answers. Can I use it on Mishimoto radiator?
    • 0 of 0 people found the following answer helpful

      A:  This cap CANNOT be used on the OEM or Aftermarket replacement radiators this cap is only designed for the expansion tank. This cap is a single valve.

      Jared A. @ RallySport Direct 12 hours ago  
      Was this answer helpful?
  • Q: Radiator Cap  Airefire6 months ago

    Can this cap be safely used on the Mishimoto radiator? This is really confusing to me.
  • Q: Using this cap on the radiator  gator.hudson456933 years ago

    On the Mishimoto website it says on their X-Line Radiator page: "CAUTION The provided Mishimoto radiator cap should replace the stock cap located on the expansion tank. The stock cap attached to the radiator should be installed on the Mishimoto Performance Aluminum Radiator. The Mishimoto radiator cap is a two way valve, while the stock radiator cap is a single valve. Due to the difference in construction, the Mishimoto cap cannot be used on the radiator. If the Mishimoto cap is fit on the radiator, overheating may occur." Is this the same cap that Mishimoto provides with their radiator that really goes on the expansion tank, or one that works on a stock radiator? It looks the same.
    • 1 of 2 people found the following answer helpful

      A:  You cannot use a Mishimoto cap on the radiator weather it be a Mishimoto or OEM the OEM cap has a different design then Mishimoto's. The mishimoto cap provided with the radiator is to be used on the expansion tank.

      Brady R @ RallySport Direct 3 years ago  
      Was this answer helpful?

This Part Fits

Universal Product
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.