+1 on the stock NGK.
$15 each for the Pulstar x6 thats NUTS...
you can index each spark plug ..
my last dyno @62k miles i pulled 96hp and 104ft.lbs of torque...How much more power do you need?
This is how much...

"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower."
- Mark Donohue
Mark, you must have a big pocketfull of green stuff. Your rear tires shouldn't last longer than 4,000 miles if they did that.
RJ,
Mark Donohue died during a race in 1975, it is just one of his famous quotes.
Mark Neary Donohue, Jr. (March 18, 1937 – August 19, 1975), nicknamed "Captain Nice",[1][2] and later "Dark Monohue",[2] was an American racecar driver known for his ability to set up his own race car as well as driving it to victories. Donohue is probably best known as the driver of the 1500+ bhp “Can-Am Killer” Porsche 917-30 and as the winner of the 1972 Indianapolis 500. Cars that Donohue raced include: AMC Javelin, AMC Matador, Chevrolet Camaro, Eagle-Offy, Elva Courier, Ford GT-40 MK IV, Ferrari 250LM, Ferrari 512, Lola T70, Lola T330, Lotus 20, McLaren M16, Porsche 911, Porsche 917/10, Porsche 917/30, Shelby Cobra, and Shelby Mustang GT350R.
In 2003, in commemoration of Penske Racing's 50th NASCAR win, Nextel Cup driver Ryan Newman drove a Dodge Intrepid painted to resemble Donohue's 1973 AMC (with a #12 and current Alltel decals) at the fall Rockingham, North Carolina, race. Penske's first NASCAR win came at the hands of Donohue.
Roger Penske's new Penske Racing complex in Mooresville, North Carolina is decorated with various murals of Donohue and his racing cars, most notably the AMC stock car and the various Porsche prototypes that Donohue drove through his career.
Mark Donohue chronicled his entire racing career in the book, The Unfair Advantage (co-written with noted motorsports and engineering journalist Paul Van Valkenburgh). The book documents his career from his first races to his final full season of racing the year before he was killed. This was not merely a celebrity autobiography, but a detailed, step-by-step record of the engineering approach he took to getting the absolutely highest performance from every car he drove, always looking for that elusive "unfair advantage". Donohue (along with Penske) were pioneers in many rights, some as notable as the use of a skidpad as a tool for developing and perfecting race car suspension designs and setups. The book told how Donohue learned to exploit the antilock braking system and the powerful turbocharged engine of several prototype Porsches, as well as how he learned from various mishaps, including a near-fatal crash. Penske and Donohue also improved upon a process called "acid dipping" when racing
https://en.wikipedia.org/wiki/Mark_Donohue