Re: NGK TR6 spark plug question "which one"
Those prices are outrageous. Go to your local auto store and get part number 4177. Shouldn't be more than $16.00 and no shipping.
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2011 Mustang GT Grabber Blue Automatic
2003 Mach 1 Whipple 2.3 718 rwhp 735 rwtq @25 psi SOLD
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