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⚡ Ignite your ride with NGK Iridium – where power meets precision!
This 4-pack of NGK Iridium IX 3521 spark plugs offers a direct OEM replacement for Suzuki GSX-R1000 models from 2001 to 2009. Featuring a durable iridium core, these plugs provide a stronger, more reliable spark that lasts twice as long as standard plugs, ensuring smoother starts, consistent engine performance, and reduced fouling. Trusted by top Japanese manufacturers, they come ready to install with original hardware and no gap adjustment required.
| ASIN | B007WD3VCC |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #470,768 in Automotive ( See Top 100 in Automotive ) #2,671 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.7 4.7 out of 5 stars (213) |
| Date First Available | April 21, 2012 |
| Item Weight | 4.5 ounces |
| Item model number | NGK1013 |
| Manufacturer | NGK Spark Plugs |
| Manufacturer Part Number | NGK1013 |
| Model | 4 pack NGK Iridium IX 3521 Spark Plug |
| Position | Front, Rear |
| Product Dimensions | 3.31 x 0.94 x 3.32 inches |
| Thread Size | RM |
| Top Material Type | Iridium |
| Vehicle Service Type | Car, Truck |
A**R
Great upgrade for 4-stroke Yamaha Jet Boats
I upgraded to these in my Yamaha Jet Boat with twin MR1's. The motors are known to foul esp with long periods of idle such as through a no wake area or idling around the dock. Performance is the same as the stocks, but the Iridium's last at least twice as long. I am going on season 3 with this set, still running strong, no signs as of yet of any fouling. With the stocks I'm lucky to get one season before I start experiencing hard starting, rough idle, erratic rpm at speed, and loss of power out of the hole... Also no gap required, just a little anti-cease around the threads and they are ready to roll right out of the box.
J**I
Always go with NGK on any Japanese sportbike. Buy ...
Always go with NGK on any Japanese sportbike. Buy what works and skip the "gimmicks" of others trying to get your dollar. They are proven and the manufacurers will always use the time tested proven parts that work. You can't argue that the top four Japanese companies are all using the same power proven plug!
J**.
Very satisfied.
Direct fit for my 03 Gsxr 1000. The ignition coils were corroded and the caps were stuck in there from the old plugs, so j removed the caps from these and inserted into the bike. No problems. Those with older bikes complaining of fitment issues even though it's the right type of plug might wanna check their ignition caps. Did give the bike more pep and runns smoother, but that's usually a result of a tune up anyway. Satisfied.
G**4
Delivered fast and fit was spot on
The new plugs made a huge difference in the performance of my 19 year old GSXR...
R**.
2007 Gsx-R 750 plugs
Replaced the plugs in a newly purchased 2007 gsxr-750. The plugs in the bike were used but good condition cr9e - the non iridium version of this plug While the iridium versions do not affect performance, they do have a much better life span. I went this route so that I will not have to replace them again while I own the bike. However, getting rid of the old plugs did provide a much smoother off/on throttle switch (no longer jerky when getting back on throttle during deceleration)
C**X
So far so good
Product came quick, fit my 2006 gsxr 1000. Started right up after putting them in runs good right now.
M**A
Perfect for K8
Perfect for my 2008 GSX-R1000 Just need to remember to remove the conducting adapter before you insert them into your bike. This fixed my rough idling at low rpm issue... thank you very much
R**.
It’s a quality product
Fixed the misfire my bike was having. Runs great now!
Trustpilot
2 weeks ago
4 days ago