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2001 GMC Sierra Ignition Systems

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JBA spark plug wires

Reviewed By Rick T (WILMINGTON, NC) Reviewed for a 2002 GMC Sierra —1/20/2016 3:13 AM

They fit perfectly between my JBA header and I'm not worried about melting the spark plug boots anymore and shorting out the spark plug.

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Reviewed By Matthew R (PAHRUMP, NV) Reviewed for a 2008 GMC Sierra —8/31/2015 4:29 PM

A good set of wires much better than what came off the truck. changed the plugs and wires on my 2008 GMC SIERRA DENALI 6.2 and getting a 1 MPG increase on the hiway planning on getting the ACCEL coils soon as well to complete my ignition upgrade

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Great increse in power and response.

Reviewed By christopher e (Fayetteville, NC) Reviewed for a 2011 GMC Sierra —8/11/2013 6:00 PM

I only gave the spark plugs 4 stars so far because I've noticed a 2 mpg increase for highway and a much faster response from V8 to V4, but strangely enough even with my light foot my city mpg has gone down by 1mpg. Weird right? The most important thing to know however is that you MUST WAIT FOR YOUR COMPUTER TO ADJUST TO THE NEW SPARK PLUGS LIKE THE INSTRUCTIONS SAY! Your engine may have a code for multiple misfires for the first 50-60 miles but it will fix itself. I have had them for 2 weeks.

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