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Their return policy is very bad and they charge a huge restocking fee. When they claim it helps on gas mileage, it's not true. Beware - You should not clip the signal wire of your oxygen sensor, which they're suggesting you clip, They're twisted and you can do damage. That's what a Chevy guy told me and I'm glad I listened to him. We did not cut the wire. Don't buy their products. All the way around, they're bad, bad, bad.
Maureen N.'s review of PerformanceChipsDirect earned 9 Very Helpful votes
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Products don't work as advertised They will not answer their phone or respond to emails. No way...
Returned the components which were never installed and still have not received my refund. Be...
