Whistler GT-138Xi Radar Detector

Marsoni

M251S

$189.86

Get it in 3 business days with 1 day shipping. Friday, May 29

Whistler GT-138Xi Radar DetectorWhat PB Tech customers are saying about this product See More Reviews "I've been testing this radar detector for 3 weeks and it works perfectly, pretty much a must have on the highway & the city. Pleased with purchase." KJ By: KevinJ96 12 12 24 Verified Owner Features https: whistlergroup. com products international gt 138xi radar detector The Whistler GT 138Xi Radar Detector features FDSR (Field Disturbance Sensor Rejection) which combats false

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We offer a 30-day return/exchange service after receiving.
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I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).

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Reviewed in the United States on September 8, 2025

Verified Purchase

Chad altenbach

Charlottesville, US

★★★★★ 5

Made well and great fit

Fits perfectly and is made well

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Reviewed in the United States on May 8, 2026