I just changed spark plugs in my 04 4runner at 62,000 miles. I got the plugs from the local toyota dealer. After I was done changing the plugs I noticed the drivers side had NGK plugs and the passenger side had the Denso plugs? I replaced all 6 plugs with the Denso plugs the dealer gave me. So the question I am asking after several hours of searching and no results is there a reason there was 2 differant types of plugs the owners manual lists both plugs but dosent say use one on the drivers side and one on the passengers side and the vehicle runs fine better then before. Thanks for any input

 

It is like that from the factory. Mainly Toyota's deal with NGK and Denso.

BTW, T4R.org is mainly a 4th gen forum, (I'm gizmopt2002 on there.)

Also Denso Iridium IX plugs on the V6 rock.

 

Sorry for the hijack but what lift and tire/wheel set-up do you have? It looks good from your profile pic. I'm thinking about getting the same set-up.thx.

 

They are 265/75/16 BFG radial at/s on 16/8 helo maxx 6 rims no lift and they rubbed like crazy I now have 255/75 BFG mud terrains on stock 17 rims