On 3 Performance Triple Fuel Hat Assembly – (1987-2004)

(9 customer reviews)

$399.00 $330.00

On 3 Performance LLC

Mustang GT / Cobra / Foxbody Double / Triple Pump Fuel Hat Designed For Return or Return-less Fuel Systems

Always Kept In Stock Ready To Ship

We were the first to offer a hat assembly for the Mustangs to allow multiple pumps to feed and have only one single feed line outlet.  Our design starts with 4 solid billet 6061 chunk of aluminum and machined down to what you see here.  This is where our setup is different from anything on the market currently.  We designed the top portion as 2 pieces and machined the top so all fuel pumps would come out of 1 single port.  Its more involved and labor intensive to do so but avoids any need for extra lines and Y-blocks.  So you just have one simple line coming out of the hat to work forward no matter how many pumps you are running.

The great part of this design, you can also run it with a return or return-less system.  We have a return port shown machined into each On3 fuel hat and if you choose to stay return-less, you just plug the -8an return port.

We now ship all fuel hat systems with our e-85 coating standard, $30 savings over last year and once again we have improved the design for 2015.  If you are going to run an Ethanol based fuel like e-85, we recommend our coating to prevent corrosion(Black Coated).  Depending on who you talk to, some believe it doesn’t matter and its not needed but we will leave that option for the purchaser of the kit.

You will not find a better deal out on the market than what we are bringing to the Ford Mustang market.  We run limited quantities of this item so don’t miss out on your opportunity to save big with our proven race parts.


– (1) Billet Machined Mustang Fuel Hat – E-85 Coated

– (3) Billet o-ringed Custom Barbs To The Pumps

– (1) Billet o-ringed Custom Barb For Return Port

– (6) O-rings For Fuel Pump Base

1987 – 1993 Foxbody 5.0 Mustang Customers:

This hat is a great option for your 5.0 fuel system but will require a fuel tank from a 99-04 Mustang.  We use this same combo on our On 3 Performance 4.6 4v swapped 90 Foxbody coupe.  In that car we are running our triple On 3 255lph pumps with E-85 in a return system.  The tank will bolt in with the stock straps but will require you to modify a filler neck from the 99-04 cars.  Its pretty simple to do and we have photos we can supply if you buy a fuel system from us.  This is a stealth system and will look like a stock tank but support 1000+ RWHP. 

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9 reviews for On 3 Performance Triple Fuel Hat Assembly – (1987-2004)

  1. Justin D

    I bought this with 2 of their On3 340LPH pumps. It’s a solid piece, and worth every penny. I had no issues with it but I recommend either getting the baffled tank they sell, or baffling a stock tank since you no longer use the basket that sucks off the bottom of the tank. I don’t let my tank get below 1/4, so it’s not a huge issue for me.

  2. Jd

    Will this work on a 03-04 Mach 1?

    • admin

      Sure will!

  3. creamerbeau

    Will this hold walbro 465 pumps

    • admin

      Sorry its designed for the 340lph pumps that we sell

  4. Austin

    Are you guys gonna make one for fbodys? looks great

    • admin

      I don’t have anything in the works right now, not sure of the market but we certainly could do so. Ill have to look into that, are you speaking 4th or 5th gen?

  5. Nick

    Will it fit ford gt pumps?

    • admin

      We have a base to accept those pumps if needed. You will need to specify when ordering because that pump measures 1.470″ and the normal base for all other pumps is 1.550″

  6. Joshua

    Will this work on a 1998 cobra

    • admin

      It will if you go with our 03-04 Cobra fuel tank, thats the only way to run it as your tank will not accept the fuel hat assembly

  7. Justin

    Will this fit in a stock 01 mustang gt tank

    • admin

      It will work in the 99-04 Mustang fuel tanks

  8. Ken (verified owner)

    Are both the supply and return port -8an?

    • admin

      No, Main fuel is 10an and return is 8an

  9. Bryan

    Will Aeromotive Stealth 340s work in this hat. I already have new ones.

    • admin

      Yes, they are made to the same spec as our pump, they use our same supplier for production.

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