bosch vs NGK-----platinum sparkplugs
#6
Speed Mach Go Go Go
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Join Date: Oct 2001
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I use the Bosch +4 Platinum on my Honda. They last longer and feel much better. I don't know any other brand that makes plugs for the RX-7 other than NGK.
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#9
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Bosch does make plugs for rotaries, at least they did at some point, because I have seen them, and my brother used to use them. I just don't know if they made Platinums for rotary applications. Actually there are a few companies out there that make plugs for rotary engines now (GReddy, HKS come from the top of my head), but for general street use, I'd stick with NGK.
#11
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it's not the Bosch +4 ... the plugs that they make for rotaries actually had 3 electrodes ... not 4. like i said, i'm not positive if they still make them, but i know that they existed as late as around 1996 because the shop where i used to buy my tune up parts still carried them then.
#13
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Join Date: Apr 2002
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$7 dollars huh....maybe i better go check out pep boys!!!!!!!!!!!!!!!! the hks plugs for my friends car were way expensive. he need 6 and they wanted like $40 a plug...um cough cough NO
#14
Ex fd *****
Mazdaformance was selling OEM Mazda (made by NGK) platinums for $8 each a while back. I believe NGK and DENSO are the only people actually manufacturing plugs for WANKEL ROTARY engines - GReddy & HKS are both made by DENSO I think - BOSCH did make rotary plugs for a while. They were the OEM supplier for the NSU wankels (Prinz & RO80)