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.
Reviewed By Bob G (Wichita, KS) Reviewed for a 2002 GMC Sierra —8/6/2013 11:02 AM
I installed these plugs, following Pulstar's directions for gap etc. The truck starts faster ( was never slow) & seems to have a little better power. I have not had a chance to check out the MPG, but expect to see a slight increase - will know more about that in a month or so, after a couple tanks of fuel.
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