SKU: 83930822144

Peak & Hold 4A/1A Driver

Sale price$155.25 Regular price$172.50
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

Peak & Hold 4A/1A DriverDescription Downloads 4 channel low impedance injectors driver unit. Peak and Hold Manual Features Current control driver for low impedance injectors 4 channels Available in three current versions: 8A 2A 4A 1A 2A 0. 5A Technical Description Peak and Hold 8A 2A Controls up to 4 injectors with impedance below 1. 5 ohm 16 Bosch 160lb h (1600cc) injectors (4 per channel) 8 Siemens low impedance injectors (2 per channel) 4 MSD low impedance injectors (2

Features

  • Current control driver for low impedance injectors
  • 4 channels
  • Available in three current versions:
    8A/2A
    4A/1A 
    2A/0.5A

Technical Description


Peak and Hold 8A/2A
  • Controls up to 4 injectors with impedance below 1.5 ohm
  • 16 Bosch 160lb/h (1600cc) injectors (4 per channel)
  • 8 Siemens low impedance injectors (2 per channel)
  • 4 MSD low impedance injectors (2 per channel) (with 2 ohms impedance per injector)
Peak and Hold 4A/1A
  • Controls up to 4 injectors with 1.5 to 3 ohms of impedance
  • 8 Bosch 160lb/h (1600cc) injectors (2 per channel)
  • 4 Siemens 83lb/h injectors
  • 4 MSD injectors (with 2 ohms impedance per injector)
Peak and Hold 2A/0.5A
  • Controls up to 4 injectors with 3 to 7 ohms of impedance
  • 4 Bosch 160lb/h (1600cc) injectors

Dimensions: 115 x 90 x 33mm

To determine which Peak & Hold you need

  1. Grab a multi-meter and select Ohms 200
  2. Touch the positive and negative leads of multi-meter together to measure resistance (record this number...i.e. measured 0.3)
  3. Then take the positive and negative leads from multi-meter and put on each terminal of the injector. Doesn't matter the order. Record this measurement
  4. Take the ohms measurement from Step 3 and then subtract the number you got in Step 2 (i.e. Step 3 4.8ohms - Step 2 0.3ohms = Total 4.5ohms)

High Impedance Injectors - Above 7ohms - No Peak and Hold Boxes are needed.
Peak and Hold 2A - 3ohms to 7ohms (Bosch 160lb/hr).
Peak and Hold 4A - Below 3ohms to 1.5ohms.
Peak and Hold 8A - Below 1.5ohms (Billet Atomizer*).
All low impedance Billet Atomizer Injectors manufactured after Nov. 2012 require 8A regardless of measured resistance.

*Billet Atomizer Injectors - Anything prior to serial # C300**** should only use the 4A/1A. This only applies to injectors manufactured prior to Nov. 2012.

Contents of Packaging

  • 1 Peak and Hold 4A/1A
  • 1 Operation and installation guide
  • 1 mounting kit (4 rubber mounts, 4 washers and 4 ¼” nuts)
  • 6ft Peak and Hold unterminated harness (optional)
  • 1 FuelTech black carbon fiber sticker

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 83930822144

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Bri
Cuba, US
★★★★★ 4
Does seem different from blue bottle version
Size: 5 Ounce (Pack of 1), Style: SPF 50+, Size: 5 Ounce (Pack of 1), Style: SPF 50+
I have to say this one is interesting. I’m use to using the Blue Lizard in the all blue bottle for the better ingredients & still effective against UV rays with the only downside of the white cast. With that being said this one does dry m o r e clear, but does seem to take longer rubbing into the skin. I also noticed I get much darker/ more red when using this one compared to barely any skin change with the all blue bottle during a beach day. It still says 50+ SPF, but I have noticed more of a pattern of that happening. Depending on how much/ long I’ll be in the sun I might use the other instead, but if I am planning to go somewhere more of a social gathering I may use this one due to it drying clear.
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Reviewed in the United States on March 8, 2026
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marsha
Omaha, US
★★★★★ 5
Great product!
Size: 5 Ounce (Pack of 1), Style: SPF 50+
I took this to Hawaii. It's great sunscreen and good to use in the ocean
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Reviewed in the United States on June 1, 2026
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Amazon Customer
San Leandro, US
★★★★★ 5
Safe for reefs
Size: 5 Ounce (Pack of 1), Style: SPF 50+
Great product and essential when visiting st John
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Reviewed in the United States on April 28, 2026
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Kelly McGinnis
Port Orchard, US
★★★★★ 5
For Professional Outdoors Folks, THIS WORKS!
Size: 5 Ounce (Pack of 1), Style: SPF 50+
I am in the sun approximately 300 days a year and I have used everything available. I am on the water daily and there are only 2 products that 1) work and 2) stay on when wet; Blue Lizard and Doo's. Both have nutrients and moisturizers keeping your skin young. This stuff WORKS! Highly recommended.
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Reviewed in the United States on April 23, 2026
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Laurenne McCarty
Birmingham, US
★★★★★ 5
Nice sunscreen
Size: 5 Fl Oz (Pack of 1)
Easy to rub in and spread compared to other mineral sunscreens. It goes on a bit white but will blend with lighter toned skin for the most part if you keep rubbing. Provides good sun protection when paired with other sun protection habits and applied regularly! Doesn’t stain fabrics
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Reviewed in the United States on May 28, 2026

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