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Power Strokes
6.4 Aftermarket
Tuning feed back thread
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[QUOTE="jdgleason, post: 25005, member: 166"] I run both Spartan and KEM tuning. Spartan tunes are good, but they do shift hard. The 210 tow performance is about all I run of theirs anymore. I have never had any bad experiences with customer service at all. Mick and Jeff have always been eager to help and quick to respond. I run the KEM 345 as a dd. The shifts are smooth, and it makes great power. It also runs very cool, and the customer service is second to none. Mike and Muj have both been awesome to work with and super knowledgable. [/QUOTE]
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