Bosch platinum +4 sparkplug

Reply Subscribe

Thread Tools

Search this Thread

Oct 11, 2011 | 05:28 AM

Jeff's 1st Harley

Thread Starter

Road Master

Joined: Dec 2009

Posts: 1,118

Likes: 5

From: Coweta, Oklahoma

Bosch platinum +4 sparkplug

Hey guys do any of you run the Bosch platinum +4 plugs? I have checked everywhere I can think to go and have come up empty. If so what plug is recommended for the 96 inch twin cam engine. Thanks for your help.

Oct 11, 2011 | 10:21 AM

128auto

Extreme HDF Member

Joined: Sep 2006

Posts: 10,114

Likes: 29

From: Vancouver B.C. Canada

I doubt it makes a difference, just get the stock champion plugs, they are fine. To be honest, I don't believe those 4 points spark plugs being a mechanic for 20 some years, I had customer complain about gas mileage. Good luck!

Oct 11, 2011 | 01:18 PM

nevil

Seasoned HDF Member

Joined: Jul 2008

Posts: 9,281

Likes: 1,139

From: southeast PA

Just stick with the stock plugs. If any of those rare metal/multi-electrode/magic bullet plugs did any good there would be lots of positive feedback here.

Oct 11, 2011 | 01:24 PM

Shredding rubber

Outstanding HDF Member

Joined: Aug 2011

Posts: 3,449

Likes: 8

From: Right about the middle

I tried em in my mustang and the electrodes get so hot that they cause pre-ignition. I went back to cheap coppers and couldn't be happier. Save your money.