Do-It-Yourself E85 Conversion Kits

4412 Stock Block




44500 Strip Kit

For Holley, QuickFuel, Proform, and Demon carburetors. All E85 kits come with gaskets and instructions.


  • 4412 Stock appearing kit--for 2-barrel 350 and 500 carbs--includes us converting your metering block (send us your stock block to be converted**), 2 jets, 1 power valve, 1 high-flow needle & seat, 1 accel nozzle, and 1 50cc E85 pump diaphragm. 1 day turnaround once we receive your block.

  • 4412 kit--for 2-barrel 350 and 500 carbs--includes 2 jets, 1 power valve, 1 purple or black billet metering block, 1 high-flow needle & seat, 1 accel nozzle, and 1 50cc E85 pump diaphragm.

  • 4150 Kit--for 4-barrel double-pumper carbs Demon, Holley, Proform and Quickfuel.--includes 4 jets, 1 high-flow PV, 1 PV plug, 2 accel nozzles, 2 purple or black billet metering blocks, 2 high-flow needles & seats, and 2 30cc E85 pump diaphragms.

  • 4160 kit--for 4-barrel vacuum secondary carbs--includes 4 jets, 1 high-flow PV, 1 accel nozzle, 1 purple billet metering block and your choice of a 2nd metering block or a jet plate (depends on your carb needs), 2 high-flow needles & seats, and 1 30cc E85 pump diaphragm.

  • 4500 kit--for HP-style Dominators--includes 2 green race billet metering blocks (a street-friendly PV primary metering block can be purchased in our Dominator Street kit), 4 HP-style annular boosters, 2 Nitrophyl® floats (standard primary and notched secondary), stainless steel squirter screws, 2 .130" stainless steel needles & seats,  2 E85 50cc diaphragms and springs, air bleeds, and 4 jets.

Personalized custom tuned kits please read this *Information Sheet*

PROFORM is a registered trademark of Specialty Auto Parts USA, Inc. Holley®, Dominator®and Double Pumper® are registered trademarks of Holley® Performance Products, Inc.

** Stock Appearing 4412 kit requires you to send your stock metering block in for conversion. Rob Mix Service, Inc. * 465 North Street * Saint Paul, MN 55130

Not sure if you can do the work? Read the instructions for 4150


4412 Purple Do It Yourself 2 Barrel Kit
$175.00

4412 Black Do It Yourself 2 Barrel Kit
$185.00

4412 Stock Appearing Do It Yourself Double Pumper Kit
$175.00

4150 Black Do It Yourself Double Pumper Kit
$335.00

4150 Purple Do It Yourself Double Pumper Kit
$315.00

4160 (Purple only) Do It Yourself Vac Secondary Kit *Sec Plate*
$315.00

4160 (Purple only) Do It Yourself Vac Secondary Kit *Secondary block*
$325.00

4500 (Green) 3 cir HP Only Do It Yourself Kit for Dominator Strip
$395.00


Gas Conversion Kit
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Gas Conversion Kit

Convert your E85 carb back to gas
4 main jets
4 Idle fuel restricters
2 PV restrickters
1 PV Gasket
2 Bowls and 2 Metering Block Gaskets
2 Gas size Accellerator nozzels & Gaskets

We need to know what size carb you are converting so we can send correct parts. This kit works best on our billet block carburetors.

Gas Conversion Kit
$89.00
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Don't Forget a Test-Kit


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