SKU: 30950460084

JB4 EWG Add On Connectors for Kia Stinger 3.3T, G70, Infiniti VR30 Q50 Q60, Mazda 2.5T

Sale price$1524.60 Regular price$1694.00
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

JB4 EWG Add On Connectors for Kia Stinger 3.3T, G70, Infiniti VR30 Q50 Q60, Mazda 2.5TThe new EWG connections allow the JB4 to directly add and subtract wastegate duty cycle (WGDC) from the wastegates providing additional tuning flexibility. Most useful for modified vehicles that are having problems targeting boost properly and will also improve boost response, spool up, shifting performance, and overall feel. Installation involves plugging the wires in to the JB4 harness, updating the JB4 firmware and settings, and attaching them to

The new EWG connections allow the JB4 to directly add and subtract wastegate duty cycle (WGDC) from the wastegates providing additional tuning flexibility. Most useful for modified vehicles that are having problems targeting boost properly and will also improve boost response, spool up, shifting performance, and overall feel.

Installation involves plugging the wires in to the JB4 harness, updating the JB4 firmware and settings, and attaching them to the wastegates which are relatively easy to reach from the engine bay.

Note JB4 models shipped prior to Oct, 2019 may also require an updated 2580 master chip (available here) if EWG wires trigger a startup fault code that clears until restarted.

Click here for installation directions and discussion

JB4 EWG Features & Benefits

• Provides additional tuning flexibility
• Directly controls the wastegates

• Improves boost response
• Turbo spool up
• Shifting performance
• Overall feel

Installation involves plugging the wires in to the JB4 harness, updating the JB4 firmware and settings, and attaching them to the wastegates which are relatively easy to reach from the engine bay.

Download install guides

Kia Stinger/G70 and Infiniti VR30 Q50/Q60

Mazda 2.5T V2

Shipping Notes
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Exchange/Return Notes
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SKU: 30950460084

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Patrick Turner
New York, US
★★★★★ 5
Great shirts.
Size: X-Large, Color: Black
I have 10. These are great, stylish shirts especially for the price. I usually wear between size L-XL slim fit (Banana Republic). I’m 6’ 200 lbs medium athletic build and L fits perfectly. With a quick press, they do not wrinkle easily. I get plenty of compliments.
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Reviewed in the United States on April 24, 2026
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Kendall
Carnegie, US
★★★★★ 4
Runs large, not slim fit
Size: Medium, Color: Green
The shirt definitely runs large like all the other reviews say. I usually wear a large, but the medium fit much better. The shirt is definitely not slim fit though.
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Reviewed in the United States on April 3, 2026
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Richmonddiva
Charlottesville, US
★★★★★ 5
Great fit and look
Size: Medium, Color: Grey
Husband loved it! Great fit and he said it was comfortable. Can be worn untucked or tucked in pants. He wore it with jeans and a blazer untucked for a graduation party and looked perfect for the occasion.
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Reviewed in the United States on May 11, 2026
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Amazon Customer
Dallas, US
★★★★★ 3
Tight in Chest for Broad Chested Men
Size: XX-Large, Color: Green
Quality is okay but not great. The biggest problem was the size. It was too tight for my broad chest. Ended up giving it away. I bought some similar shirts from a different supplier that I didn’t have issues with.
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Reviewed in the United States on April 16, 2026
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Normand H. P.
Draper, US
★★★★★ 5
Good value ...
Size: Large, Color: Green
Top quality, well made shirt, lightweight great for summer use and to fold up sleeves, like I do .
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Reviewed in the United States on May 11, 2026

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