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  • Part # 8804-C If you are looking for a fuel pump that will feed big power AND is easy to plumb. Our #8804 fuel pump and regulator combo does the trick. This is a carefully selected combination of parts designed to eliminate the high side pressure design fuel systems. These antiquated layouts simply wear the pump out, heat the fuel up and drain your battery. Our #8804 Fuel pump and regulator combo operates on a return setup. This greatly increases pump life and greatly improves fuel pressure accuracy.
    Under High fuel demand or when G-force loads are high, the bypass loads the pump and the pump steps up to give the fuel line those pressure increases needed to keep your carb or nitrous fuel pressure rock solid. BUT, when G-forces or fuel demand is low... like when you slow back down or are driving around, the return style system takes the load off the pump. This layout reduces wear, eliminates heating/boiling of the fuel, simplifies plumbing and reduces battery draw.  
  • Part # P26157
    Are you tired of buying different fuel line kits for different carbs or adding a bowl extension or different metering blocks and then your log won't fit? Well our new adjustable fuel log solves all those issues.  The design fits all the SV1 carburetors, 4150 and even the Dominator style carburetors.
    This is the last fuel log you should ever have to buy.  We thought of everything on this one.  It also includes all the fittings you see here.  The unit uses an o-ring design and extra length sweep to allow it to slide to fit every combination we could think of. This allows for the use of standard or thicker metering blocks, it can be used with or without bowl extensions and is even compatible for carburetors that dont use rear metering blocks (like vacuum secondary carbs).
    The extra large capacity fuel log storage area helps reduce foamed fuel from entering the bowl and it also has provisions for a fuel pressure sensor.
    Its coated for corrosion resistance and is compatible with all street and racing fuels even Q16, Alcohol and E85 fuels.
  • Part # P26156 Fuel Lines, designed for Holley dual feed carburetors, feature braided -8AN line with a -4AN fitting for a fuel pressure gauge. Fuel line is 9-5/16” center to center.
  • Part # P26158 Fuel Lines, designed for Holley Dominator and SV1 series carburetors, feature braided -8AN inlet and -4AN fitting for a fuel pressure gauge.
  • Part # P6002
  • Part # PN 7790 Simplify the installation of a Wide open throttle switch on your SV1 with this heavy duty bracket and Micro switch.
  • Part # P7760
  • Part # P7765 The Mach 2 Phenolic Shear plate for 4500 series intake manifolds is 1/2" tall. If you are mounting your SV1 on a 4500 series intake or Dual carb intake, the Mach 2 is just the ticket for maximizing power and throttle response. The Mach 2 is designed for the 110mm blade equipped SV1 to increase horsepower, improve low speed signal on low signal engine programs, increase throttle response and drastically improve part throttle signal generation. PLUS its phenolic so it acts as a heat insulator as well. A typical 700-900 h.p. engine will consistently show a 7-12 h.p. gain when employing the Mach 2 Shear plate.
  • Part # P7762 The Mach 3 Air Straightener for 4500 series intake manifolds is only 1/2" high to increase hood clearance (versus the 1" tall Mach 4 spacer). If you are mounting your SV1 on a 4500 series intake and even a Dual carb intake, the Mach 3 is just the ticket for maximizing power and throttle response without increasing your plenum volume OR decreasing hood clearance. The Mach 3 is designed for the 115mm blade equipped SV1 to increase horsepower, improve low speed signal on low signal engine programs, increase throttle response and drastically improve part throttle signal generation. Dyno testing on many 900 to 1300 h.p. engines has consistently shown us an average 10 h.p. gain when employing the Mach 3 Air Straightener.
  • Part # The Mach 4 Air Straightener for 4500 series intake manifolds is 1" tall. If you are mounting your SV1 on a 4500 series intake, the Mach 4 is just the ticket for maximizing power and throttle response. The Mach 4 is designed for the 115mm blade equipped SV1 to increase horsepower, improve low speed signal on low signal engine programs, increase throttle response and drastically improve part throttle signal generation. A typical 900-1300 h.p. engine will consistently show a 7-12 h.p. gain when employing the Mach 4 Air Straightener.
  • Part # P26100 Air Pans fit between the carburetor and cowl area to keep engine heat away from and direct cool air to the carburetor.  A properly laid out air pan is typically worth 15-25 h.p. and really helps with consistency as underhood temps typically vary exponentially.  Oftentimes as much as 50-80 degrees higher over an outside ambient change of only 5-20 degrees. But building an air pan is tough and time consuming.  This pan really shortens your workload. With high side rails and and a long rear tray, this air pan requires only trimming to fit most applications. Actual Size: 24" Wide X 5" Tall X 28" Long Carb mounting flange is uncut so you can easily locate it in your engine bay.
  • Part # P2000 These Anti Reversion or Shear Plates for 2" bore base plate carburetors (1050 cfm and 1150 cfm Dominator Carburetors are typically 2" bore) are the only way to fight reversion problems.  Reversion problem symptoms are: 1.  Poor throttle response 2.  Poor cylinder to cylinder control of fuel 3.  Difficulty in properly jetting engine 4.  Lazy shift recovery and acceleration These plates simply bolt on between your carburetor and intake manifold and are only 1/2" thick at the deck and the reversion ledges extend down into the intake area a further 1/2". 2" bore Anti Reversion plates: $85.00 each (Gaskets included).
  • Part # P2125 These Anti Reversion or Shear Plates for 2.030 to 2-1/8″ bore base plate carburetors (1250 cfm Dominator Carburetors are typically 2-1/8″ size throttle blades) are the only way to fight reversion problems. Reversion problem symptoms are: 1. Poor throttle response 2. Poor cylinder to cylinder control of fuel 3. Difficulty in properly jetting engine 4. Lazy shift recovery and acceleration These plates simply bolt on between your carburetor and intake manifold and are only 1/2″ thick at the deck and the reversion ledges extend down into the intake area a further 1/2″. 2-1/8″ bore Anti Reversion plates: $85.00 each (Gaskets included).
  • Part # 8805 If you are looking for the most consistent fuel pressure with minimal pressure drop under a load, you need to use a Bypass regulator.
    Our Part # 8805 Billet bypass regulator is the best way to go to give you rock solid fuel pressure.
    The regulator is a simple hook up and go setup that can be plumbed in many different ways.
    Includes 3 -8AN fittings as shown.
    Check out our 440 Fuel pump page (in our Racing Parts section) for various plumbing diagrams for the 8805 regulator.
  • Part # P12-704
  • Fuel is what makes the power in a nitrous application. You have to get it there and you have to control it. This modified Holley regulator is setup to open on a hair trigger and offer stable fuel pressure throughout the run. It's been body relieved to speed up the opening rate and hand seated to reduce fuel creep. More instantly available torque for your nitrous program can be yours for only $64.95. Part # PN-803
  • Part # PG-803 The PG-803 is nothing new. Its a professionally modified Holley regulator that's been used for years in NHRA Pro-Stock competition. Unlike look-alike regulators that make big flow claims yet still utilize the small seat area that froths and foams up the fuel.  We install a 50 percent larger seat area to reduce fuel bowl foam and stabilize the fuel pressure during high flow rates.  You get good clear burnable fuel and more consistent power from run to run. Once again simplistic design is the key to consistency and reliability. The PG-803 has enough flow capability to CLEANLY feed over 1000 horsepower!
  • Part # 7742 The SV1 keeps getting better and better. Fresh off the win at Hot Rod Drag Week, Dual SV1's powered the fastest Naturally aspirated car to ever win the event. The SV1 then won a heads up shootout against the best in the business in a independent dyno competition. Well a new development in boosters for the SV1 has entered the arena. If you have a real tight converter and your car leaves real lazy or worse yet, you cant even get the car to jump up on the converter when you stomp it? We got the answer. Are you looking for more torque and a carb(s) that will instantly jump to the chip when staging? Our SV1's are now available with Power boosters. Our new SV1 Power boosters massively expand the low rpm fuel cone and they incredibly strengthen low speed signal for improved low rpm atomization and instant response to throttle movement and shift recovery. These things are wicked!! Available now for all model SV1's. $29.00 per booster (2 per carb required).
  • Part # 7801 The new Pro Systems 7801 Multi Fire HD-i box is the final step in Multi Spark boxes.  Offering incredible reliability and unparalleled consistency for your street, bracket car, circle track, off road, or road race application. Designed to withstand the rigors of full time street use, bracket racing, competition road racing, off road racing and circle track racing, the 7801 Multi Fire HD-i box is your best choice for the power, consistency and reliability you need from your vehicle. The Pro Systems 7801 Multi Spark Ignition is one box, that takes Multi Spark to the next level in performance and reliability.  Easy to install and comes with a built in rev control (install the rpm chip of your choice..making it legal for chip limited racing) this box is all you need for your vehicle. Our 7801 boxes are built and can be serviced right here at PRO-SYSTEMS *Priced at $189.00  **FREE SHIPPING IN CONTINENTAL U.S.A!
  • Part # VID Learn how to tune Professional engines! In this informative and detailed video we describe: BSFC numbers and analysis Distillation curves of fuels and using them to your advantage Analyzing RacePak Data Reading sparkplugs on regular fuels Reading sparkplugs on C-series fuels Adjusting Air bleeds Selecting sparkplug heat ranges Extensive dyno sheet analysis Fuel curves De-mystified Selecting a proper fuel Using ICT in the real world Altering individual cylinder timing without ICT Jetting with large plenums This video also includes a live demonstration on the wet-flow bench and much much more. Our subjects in the video range from 4150 tuning tips, Dominator sizing and calibration information to correcting and analyzing an IHRA Pro Modified racing engine, and we even give up the secrets to the perfect fuel curve, tested by the current IHRA Pro Stock World Champion. After watching and understanding all the information in this video you'll have completed your knowledge of tuning a high performance engine. This one has it all! There is so much information in this video, you will have to watch it over and over again. When placing your order, please be sure to select VHS or DVD.
  • Part # SPK1 Stop guessing! This is the best scope available for reading spark plugs. We're racers, so we even upgrade this one to have a super white light to make locating porcelain heat, timing marks and misting even easier. You say you don't know how to read all the information a spark plug provides? Well, you will now. Our tuning video is included. This video gives you an intense series of lessons in reading spark plugs and tuning your engine. You will watch this video over and over. Now you have the knowledge and the equipment...go tune that engine! Check out this link regarding reading spark plugs.
  • Part # PN7785 If you have an SV1 and want to install an air cleaner our Billet air cleaner bracket makes the install easy. Its strong too, cycled over 1000 times with a 100 lb. load without failure. The bracket extends up and away from the venturi to allow incoming air to fill and straighten. $24.00 includes mounting hardware.
  • Part # P26159/60 Its finally here the SV1 throttle bracket. This ONE bracket fits BOTH 4150 and Dominator bolt patterns. Its billet and has the return spring kit built right into the design. Its everything you need in one. Just choose between the factory GM end or the Lokar cable end.
  • Part # 7111 **Available now as an upgrade for all Pro Systems 4150, SV1 and Dominator carburetors.  $79.00 per block.