★★★★★ 5
Worked perfectly
Excellent product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
Kooks 04-09 Cadillac CTSV & All Pontiac G8 12in - 02 Ext Harn Each
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Kooks 04-09 Cadillac CTSV & All Pontiac G8 12in - 02 Ext Harn EachSKU: CAS 109004 UPC: 842422120597 Kooks CAS 109004 12 Inch O2 Sensor Extension Harness for 20042009 Cadillac CTS V & 20082009 Pontiac G8 LS2 LS3 The Kooks 12 inch oxygen sensor extension harness solves wiring reach issues when installing long tube headers on 20042009 Cadillac CTS V and 20082009 Pontiac G8 models with LS2 or LS3 engines, providing a plug and play solution that repositions the upstream O2 sensors for accurate air fuel monitoring and ECU
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
Based on 1165 reviews
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Product Reviews
★★★★★ 4
Check the gap!
Plugs work great. I will say for those reviews saying they got a dud. CHECK THE GAP!!! Both plugs were not at 0.030 as advertised. I gapped the plug and it worked perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Great
Needed one for my mower, got a box of 2. Works great!
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Reviewed in the United States on May 20, 2026
★★★★★ 3
Didn’t work well in my B&S engine
Worked for 15 minutes. Repeatedly stalled. Replaced with name brand and ran like new.
UPDATE. Seller immediately offered refund well outside refund window of opportunity. That’s nice to have someone stand behind their product
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Lawnmower sparkplug
Worked great, easy to install, fast replacement. And 2 for the price of one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
