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Old 01-04-2007, 08:11 PM   #1
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Default Autolite Extreme Performance XP 606

Hi, Bonneville Club im a new member to the club and i have 2000 Bonnie SSEI. I want to know if anyone can tell me if they used them or heard anything about these plugs or what plugs to use if these are good. So far all i have done is a zzp PCM, 3.4 pulley, 180 thermastat and a fenderwall Intake.
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Old 01-05-2007, 02:28 AM   #2
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Welcome to the club buddy! I think I've seen those plugs on the internet or somewhere but I haven't heard of anyone using them. As for the "Extreme Performance" part they aren't going to help you make any more hp. If anything thing you may need to be running a heat range colder of a plug. But depending on the part of the country you live in you could probably getaway with using a stock heat range for the colder months (like I'm doing right now).

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Old 01-05-2007, 12:17 PM   #3
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Thanks, Ed. Very detailed answer.

1. Plugs don't add power unless you have the wrong plugs in your car or they need to be changed.

2. You should be running one heatrange colder than stock with a 3.4" SC pulley.

And a little more....

3. Never use platinum plugs or Bosch plugs of any time in a Supercharged motor. Irridium are fine, copper plugs are preferred. Bosch plugs have a bad track record here, and platinum plugs don't dissipate heat well enough.
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