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  1. Engine and Technical Discussion
    Before anyone says "search" ....I have. I live in montreal which we get very cold winters. I'm looking to change my plugs but not sure what to go with? HKS or NGK 1422. Car is none stock for the time being. Planning on adding down pipe and lap3 tune. Dealer sells stock plugs for 225$ which is nuts.
  2. New Member Introductions
    I own a 2013 Kia Optima with 96000 mile on it and will be changing the spark plugs for the first time on it. Any suggestions on what brand and possibly where I should get them?
  3. 3rd Generation Optima (2011 - 2015)
    Owners manual for this info is of course, useless, as designed. I am finding several different spark plugs on auto zone etc, all with different gaps. Searching here is also returning threads where folks have been tuning their gap / buying different brands.I just want the stock info so I can...
  4. 3rd Generation Optima (2011 - 2015)
    Good evening optima owners! I have a question about HKS Spark plugs for the lap3 chip tune, and I need some help! I currently got the lap3 chip installed with stock HKS spark plugs from k5 optima store and the OCC. The issue that I currently have is low MPG (around 17~19) and it was once at this...
  5. 4th Generation Optima (2016 - 2020)
    Finally took the leap and dropped some money on the chip and plugs. Couldn't be happier especially since there's a Fourth of July deal going on. Woo bring on the parts!!
  6. 3rd Generation Optima (2011 - 2015)
    I am looking to part with these and pass them along to someone new. Lap3 uncle Chip + custom box - $565 Add W1 oil catch can with bracket and upgraded hoses - $85 HKS Plugs [new - I purchased two sets. These run so nice] - $110 Prices include shipping to the lower 48.
  7. Engine and Technical Discussion
    so as the title says, any recommendation for sparks for 2.4L? I've hit 76k and want to get a replacement without braking the bank please lol. I'm looking to replace OEM, i dont have any tune or performance mods.... Just looking for maintenance work, with a slight performance boost would be...
  8. Engine and Technical Discussion
    Product http://www.k5optimastore.com/products/limited-edition-gunmetal-hks-bov-kit http://www.k5optimastore.com/collections/new-products/products/hks-m45xl-spark-plugs Noob and was looking for clear instruction on an install for both products! Spark plugs are gonna need to be changed soon so...
  9. Engine and Technical Discussion
    Just installed my lap3 tune this weekend and I pulled the stock plugs which had 15000 miles on them only running 93 they looked like this, has anyone checked there spark plugs
  10. K5OS - Performance
    Is proud to present to the Optima community The HKS M45XL Super Fire Racing Spark Plugs (BUY NOW) Description: Upgrade your factory spark plugs with these high end performance series racing spark plugs from HKS These HKS M45XL Spark Plugs are designed to handle some of the most advanced...
  11. Engine and Technical Discussion
    Today I received my NGK ILKR8E6 spark plugs and will install them tomorrow. Has anyone else installed these plugs in their 2.0T? I read they are better performing than the stock Denso plugs due to having a .022 gap and cooler heat range. They are listed for the 2008 Mitsubishi EVO X 2.0T...
  12. Engine and Technical Discussion
    Ok. Idk if this is answered or not but I have everything ready to go for my BTR tune except the tune itself. But I have the plugs and occs ready to install, and I am a few hundred miles off of getting an oil change. If I go ahead and install the m45xl plugs and the heavier 5w40 oil, without the...
  13. K5OS - Performance
    Is proud to present to the Optima community The NGK Spark Plug Collection NGK R2556B-8 Racing Competition Spark Plugs (BUY NOW) Description: Upgrade your factory spark plugs with these fantastic performance competition spark plugs from NGK Engineered to withstand the harshest engine...
  14. Engine and Technical Discussion
    For some background on my situation check out this thread: http://www.optimaforums.com/forum/170-service-center/87065-45k-mile-service-help.html I just passed 44k miles in my 2011 SX last week so I went to the dealer the other day to get new spark plugs (the updated colder ones) and I put them...
  15. The Service Center
    First things first sorry to all the admins/mods if im bringing up an old subject but im confused... As we all know my baby is a 2011 K5 SX im at 63k now and I checked the plugs and they were the denso zxu20hcr8's. I just came up with the funds for new plugs but I'm not sure if I should be going...
  16. Engine and Technical Discussion
    I know the manual says these plugs can go to 100K, but I think 50k is a good time to change them. Used a coupon at Advanced and got the OE Denso iridiums for $48. I noticed some oil on the coil collars. And additional oil on the threads. Not sure what to make of this. Valve cover gasket? But...
  17. Engine and Technical Discussion
    Hey guys, I was wondering about what kind of spark plugs your all using? Or does changing out to a better spark plug not really affect performance? I was looking to try and pump out some more juice out of my car if at all possible... Is it worth it, or should I just stick to my factory plugs...
  18. Engine and Technical Discussion
    Hey guys I thought I would share this with you all... but my stupid dealer has kept telling me our cars are not due for plugs until about 65 thousand miles I knew he was full of crap. but anyways I just installed my btrcc tune and and new hks plugs courtesy of gunmetal" and when we took the oem...
  19. Engine and Technical Discussion
    I decided to change my plugs on my 2012 SX turbo and ran into a problem. The ground strap nipple where its welded on has metal balls and spikes sticking out around it. It looks like welding splatter. These are the ZXU20HCR8 plugs. This is my 2nd set from a different location. First is AZ and the...
  20. DIY Projects
    I looked in the owners manual and couldn't find the name/part number for the stock plugs for a 2013 SXL. Maybe I overlooked it but does anyone know the stock plug name and part number by any chance?
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