SKU: 41272554189

Link ECU KnockBlock G4+ (KNB)

Sale price$279.51 Regular price$310.57
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Link ECU KnockBlock G4+ (KNB)The G4+ KnockBlock is an essential tool for tuning and can aid in the early detection of incorrect ignition timing, lean air fuel mixtures and mechanical issues. It is used it with ear buds, headphones or noise cancelling ear muffs and features special filtering to allow you to listen in and detect knock early. Listen to one or two knock sensors Special filtering design improves signal to noise ratio Can be used with ear buds, headphones or noise

The G4+ KnockBlock is an essential tool for tuning and can aid in the early detection of incorrect ignition timing, lean air/fuel mixtures and mechanical issues. It is used it with ear buds, headphones or noise cancelling ear muffs and features special filtering to allow you to listen in and detect knock early.  

  • Listen to one or two knock sensors
  • Special filtering design improves signal to noise ratio
  • Can be used with ear-buds, headphones or noise cancelling ear muffs
  • Long life lithium rechargeable battery
  • Rugged CNC aluminium enclosure
  • Flying lead headphones connector
  • Can be used with all OEM knock sensors
  • Can be used to interface directly to a laptop for recording of engine noise or knock sensor frequency analysis (using PCLink G4+)
  • Please note headphones with their own noise filtering may be unsuitable for use with the knock block.

What’s in the Box?
G4+ KnockBlock
2 sensor looms (attached)
1 headphone loom (attached)
Quick Start Guide
1 USB cable mini
2 Bosch type doughnut OEM knock sensors
2 small Link Engine Management stickers

Specifications:

Operating
Install the knock sensor/s in a suitable location on the engine (typically on a solid mounting point on the block near the cylinder head)
If only using one sensor, leave the unused sensor cable disconnected
Turn the volume control clockwise until it clicks. The LED indicator will turn blue when the KnockBlock is operating
Turn the volume to the minimum setting (most anti-clockwise)
Connect headphones to the 3.5mm audio jack
Run the engine and carefully increase the volume (clockwise) until engine mechanical noise can be heard. Adjust to a comfortable listening volume
Charging
Turn off the KnockBlock by turning the volume control anti-clockwise until it clicks
Connect the USB charging cable to the KnockBlock’s Mini USB connector. Can be charged from any standard USB charger PC, laptop, car or cell phone charger (2.1A at 5V max)
The LED indicator will show red while charging. When the indicator turns off the battery is fully charged
Charge the G4+ KnockBlock after use and before storage

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: 41272554189

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★★★★★ 5
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Reviewed in the United States on February 4, 2026
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Mary Lou back to San Diego
Birmingham, US
★★★★★ 5
Supper quality
Looks great. Looks like real leather. Large but doesn’t look it. Holds my small purse/wallet perfectly I can easily take it out of the purse and use the small purse for yoga and other events I don’t need a large purse for. Exactly what I needed. I love it.
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Reviewed in the United States on August 24, 2024
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Andrea
Battle Creek, US
★★★★★ 5
Great bag, roomy
Color: Coffee
I like the look and feel of the bag. It is small and lightweight but it still fits my laptop so it makes going to and from work easy.
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Reviewed in the United States on November 20, 2024
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Ann
Cuba, US
★★★★★ 5
Beautiful leather bag
This bag is beautiful! The color and size are perfect, and it has plenty of useful pockets inside. Great purchase!
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Reviewed in the United States on August 6, 2025
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KAC
Bozeman, US
★★★★★ 4
Top of bag very narrow
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Reviewed in the United States on April 9, 2026

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