Customer Reviews:
Showing reviews 1-5 of 12
 Better than gadget plugs February 3, 2009
Josh Assing
I have used the Denso plugs on my cars & race bike. I don't notice much in the cars (other than I haven't replaced a plug yet) but on the race bike; which I would have to replace regularly; they have proven to last longer; and I have had less misfires at redline. Expensive; but worth it.
(btw: asked someone to pick up a standard plug for my generator, they brought me an E3 plug -- avoid these; it cracked less than a month. Their arranty is "life of the engine" -- if it had completely fallen apart, engine life would have been over -- Avoid gadget plugs like E3, split electrodes, etc)
5 star product May 31, 2010
Ahmad S. Barham (Jordan, Amman)
I own a Civic LX 99 and this product made my engine start quicker and run smoother I had NGK before installing this! I will definitely be buying it once again except if Denso come up with better ones :-) (I highly doubt they will)
Best choise for the toyota corolla July 24, 2010
Yueqi Hu (wa.usa)
I bought four of this and replaced the old plugs on my 2003 toyota corolla le 94k, they work perfect.
Do not buy any platinum plug, cause the OEM plug is Ir,
the OEM plug is Denso SK16R11 or NGK IFR5A11, the old plugs in my car are SK16R11, but I also see some one have NGK in their corolla on the BBS, I guess just Toyota use different OEM parts in different time.
you can buy the OEM one, they last longer.
but change to IR16 can increace the performance a little bit(Due to the instruction on the Denso's website).
OEM REPLACEMENT GIVES PLEASANT SURPRISE! August 2, 2009
Brian J. Reiss (PORT ANGELES,WA)
3 out of 5 found this review helpful
AFTER RECENT CHECKS OF THE SPARK PLUGS IN MY 2007 PRIUS TOURING MODEL, I KNEW IT WAS TIME FOR REPLACEMENTS. I WAS TEMPTED TO TRY THE NEW PULSE TYPE PLUG, BUT DECIDED TO OPT FOR A MORE CONVENTIONAL OEM TYPE PLUG. A BRIEF INTERNET SEARCH RESULTED IN NUMEROUS IRIDIUM TIPPED PLUGS, BUT THE DENSO 5303 IRIDIUM PLUG HAD ONE OF THE SMALLEST CENTER ELECTRODES AT .004. WHAT THE CLAIM IS THAT THIS SMALL SIZE ELECTRODE WILL FIRE QUICKER. WELL, THAT WAS GOING TO BE PUT TO THE TEST. ROUND ONE WAS A HIGHWAY CRUISE FROM MY HOME AT PORT ANGELES,WA. TO SEATTLE WA., ABOUT 125 MILES AND I AVERAGED 50.3MPG, BY ONBOARD COMPUTER. NEXT WEEK,AROUND TOWN DRIVING TURNED IN CONSISTENT 40+ MPG, WHICH WAS AN IMPROVEMENT OF OVER 5MPG. ALL THIS HAS LEAD ME TO RATE THIS PLUG AS EXCELLENT AND AN EXCELLENT CHOICE FOR OEM REPLACEMENT FOR THE PRIUS. I ALSO FEEL THAT FOR CONSISTENT HIGH MILEAGE IT MAY BE NECESSARY TO CHANGE PLUGS EVERY 25,000 MILES OR SO. YOU SHOULD CHANGE IF YOU HAVE NOTICED YOUR MILEAGE DROP RECENTLY. AND SO FAR THE DENSO 5303 IRIDIUM PLUG HAS BEEN A SOLID PERFORMER!
Excellent June 22, 2008
Ashish Sudra (Dallas)
1 out of 2 found this review helpful
Excellent product. Have been using these on my other cars and they have yet to be replaced. Long lasting, durable and well worth the price. Highly recommend
Showing reviews 1-5 of 12
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