The best this engine has run more power and torque.The exhaust sounds good also. If you want to wake up your 6.5 I would highly recommend this power package. Lower cooling temp no fan noise.
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From: David S.

You guys were straight up! The new FSD Heat-Sync was a bolt on and plug in application. Not only does it start and restart every time but it runs smoother and has a little more power then before. Thank you for your help. Mike C.
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From: Mike C.