NGK 3521 CR9EIX Iridium IX Spark Plug
Regular price$13.39
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NGK 3521 CR9EIX Iridium IX Spark Plug. A spark plug for ignition-system maintenance. Listed applications include Aprilia RSV4 Factory, Aprilia RSV4 Factory SE, Aprilia RSV4 R. See the table below for exact years and model variants.
Features & Specifications
- Fine Iridium tip ensures high durability and a consistently stable spark.
- Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines.
- Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties.
Product Details
- Brand: NGK
- Manufacturer Part Number: 3521
Vehicle Fitment
| Year | Make | Model |
|---|---|---|
| 2010 | Aprilia | RSV4 Factory |
| 2011 | Aprilia | RSV4 Factory SE |
| 2010-2011 | Aprilia | RSV4 R |
| 2004-2006 | Ducati | 749 |
| 2005-2006 | Ducati | 749 Dark |
| 2004-2005 | Ducati | 749R |
| 2004-2006 | Ducati | 749S |
| 2003 | Ducati | 998 Biposto |
| 2004 | Ducati | 998 Matrix |
| 2003 | Ducati | 998 Monoposto |
| 2004-2007 | Ducati | ST3 |
| 2019-2020 | Harley-Davidson | FLDE Deluxe 107 |
| 2019-2020 | Harley-Davidson | FLFBS Fat Boy 114 |
| 2019-2020 | Harley-Davidson | FLHCS Heritage Classic 114 |
| 2020 | Harley-Davidson | FLHR Road King |
| 2020 | Harley-Davidson | FLHRXS Road King Special |
| 2020 | Harley-Davidson | FLHTK Ultra Limited |
| 2020 | Harley-Davidson | FLHTKSE CVO Limited |
| 2020 | Harley-Davidson | FLHX Street Glide |
| 2020 | Harley-Davidson | FLHXS Street Glide Special |
| 2020 | Harley-Davidson | FLHXSE CVO Street Glide |
| 2020 | Harley-Davidson | FLTRX Road Glide |
| 2020 | Harley-Davidson | FLTRXS Road Glide Special |
| 2020 | Harley-Davidson | FXBRS Breakout 114 |
| 2020 | Harley-Davidson | FXFBS Fat Bob 114 |
| 2015 | Harley-Davidson | XG500 Street 500 |
| 2015 | Harley-Davidson | XG750 Street 750 |
| 2009-2012 | Husqvarna | TE250 |
| 2012 | Husqvarna | TE310 |
| 2010-2012 | Husqvarna | TXC 250 |
| 2012 | Husqvarna | TXC 310 |
| 2013 | KTM | 250 SX-F |
| 2003-2007 | Kawasaki | JT1200 STX-12F |
| 2009-2010 | Kawasaki | JT1500 STX |
| 2004-2014 | Kawasaki | JT1500 STX-15F |
| 2007-2014 | Kawasaki | JT1500 Ultra LX |
| 2005-2006 | Kawasaki | Z750S |
| 1993 | Kawasaki | ZR1100 |
| 1999-2000 | Kawasaki | ZRX1100 |
| 2001-2005 | Kawasaki | ZRX1200 |
| 1995-1997 | Kawasaki | ZX1100 GPZ |
| 1990-2001 | Kawasaki | ZX1100 Ninja ZX-11 |
| 2001-2005 | Kawasaki | ZX1200 Ninja ZX-12R |
| 1990-1997 | Kawasaki | ZX600 Ninja 600R |
| 1990-2002 | Kawasaki | ZX600 Ninja ZX-6 |
| 1995-2002, 2007-2012 | Kawasaki | ZX600 Ninja ZX-6R |
| 2003-2005 | Kawasaki | ZX600 Ninja ZX6-RR |
| 2003-2006, 2013-2014 | Kawasaki | ZX636 Ninja ZX-6R |
| 2015 | Kawasaki | ZX636 Ninja ZX-6R 30th Anniversary |
| 2013-2014 | Kawasaki | ZX636 Ninja ZX-6R ABS |
| 2015 | Kawasaki | ZX636 Ninja ZX-6R ABS 30th Anniversary |
| 1991-1995 | Kawasaki | ZX750 Ninja ZX-7 |
| 1991-1995 | Kawasaki | ZX750 Ninja ZX-7R |
| 1994-2003 | Kawasaki | ZX900 Ninja ZX-9R |
| 2003-2008 | Kawasaki | ZZR 600 |
| 2002-2005 | Kawasaki | ZZR1200 |
| 2009 | MV Agusta | F4 RR 312 1078 |
| 2013-2014 | Polaris | Ranger 900 XP |
| 2012-2013 | Polaris | Ranger RZR 570 |
| 2013 | Polaris | Ranger RZR 570 EPS Trail LE |
| 2013 | Polaris | Ranger RZR XP 4 900 |
| 2012-2013 | Polaris | Ranger RZR XP 4 900 EPS LE |
| 2011-2013 | Polaris | Ranger RZR XP 900 |
| 2013 | Polaris | Ranger RZR XP 900 EPS LE |
| 2013 | Polaris | Ranger RZR XP 900 EPS Walker Evans LE |
| 2013 | Polaris | Ranger RZR XP 900 HO Jagged X Edition |
| 2012-2013 | Polaris | Ranger RZR XP 900 LE |
| 2001-2007 | Suzuki | DR-Z250 |
| 1994-1999 | Suzuki | DR350 |
| 1994-1999 | Suzuki | DR350SE |
| 1996-2003 | Suzuki | GSF600S Bandit |
| 2001-2006 | Suzuki | GSX-R1000 |
| 1993-1998 | Suzuki | GSX-R1100 |
| 1992-1993, 1997-2007 | Suzuki | GSX-R600 |
| 1993-2009 | Suzuki | GSX-R750 |
| 1999-2007 | Suzuki | GSX1300R Hayabusa |
| 2006 | Suzuki | GSX1300R Hayabusa Limited Edition |
| 1996-2006 | Suzuki | GSX600F Katana |
| 1999-2006 | Suzuki | GSX750F Katana |
| 1994-1996 | Suzuki | RF600 |
| 1994-1997 | Suzuki | RF900 |
| 1998-2003 | Suzuki | TL1000R |
| 1997-2001 | Suzuki | TL1000S |
| 2003-2004 | Triumph | Daytona 600 |
| 2005 | Triumph | Daytona 650 |
| 2006-2014 | Triumph | Daytona 675 |
| 2011-2014 | Triumph | Daytona 675 R |
| 2002-2004 | Triumph | Daytona 955i |
| 2003-2005 | Triumph | Speed Four |
| 2002-2004, 2007-2008 | Triumph | Speed Triple |
| 2002-2004 | Triumph | Sprint RS |
| 2002-2010 | Triumph | Sprint ST |
| 2008-2013 | Triumph | Street Triple 675 |
| 2014 | Triumph | Street Triple ABS |
| 2009-2013 | Triumph | Street Triple R |
| 2014 | Triumph | Street Triple R ABS |
| 2000-2003 | Triumph | TT600 |
| 2007-2010 | Triumph | Tiger |
| 2011 | Triumph | Tiger 800 |
| 2011-2014 | Triumph | Tiger 800 ABS |
| 2011, 2014 | Triumph | Tiger 800 XC |
| 2011-2013 | Triumph | Tiger 800 XC ABS |
| 2008-2012 | Yamaha | FX10 FX Nytro |
| 2012 | Yamaha | FX10M FX Nytro MTX 153 |
| 2010-2011 | Yamaha | FX10M FX Nytro MTX SE 153 |
| 2008-2010 | Yamaha | FX10MT FX Nytro MTX |
| 2008-2012 | Yamaha | FX10RTR FX Nytro RTX |
| 2008 | Yamaha | FX10RTRA FX Nytro RTX 40th Anniv |
| 2009-2012 | Yamaha | FX10XT FX Nytro XTX |
| 2008 | Yamaha | FX1100 WaveRunner FX HO |
| 2009-2015 | Yamaha | FZ6R |
| 2011-2013 | Yamaha | FZ8 |
| 2001-2015 | Yamaha | FZS1000 FZ1 |
| 2004-2009 | Yamaha | FZS600 FZ6 |
| 2003-2005 | Yamaha | RX10 RX-1 |
| 2011-2012 | Yamaha | RX10PS Apex SE |
| 2008-2012 | Yamaha | RX10R Apex |
| 2006-2007 | Yamaha | RXW10 Attak |
| 2004-2005 | Yamaha | RXW10 RX Warrior |
| 2014 | Yamaha | SR Viper |
| 2000-2006 | Yamaha | TTR250 |
| 2008, 2010 | Yamaha | VX1100 WaveRunner VX |
| 2008-2012 | Yamaha | VX1100A WaveRunner VX Cruiser |
| 2008-2012 | Yamaha | VX1100B WaveRunner VX Deluxe |
| 2008-2012 | Yamaha | VX1100C WaveRunner VX Sport |
| 2007-2009, 2012-2013 | Yamaha | WR250F |
| 2008-2015 | Yamaha | WR250R |
| 2008-2011 | Yamaha | WR250X |
| 2012-2013 | Yamaha | YZ250F |
| 1998-2001, 2004-2008 | Yamaha | YZF-R1 |
| 2006 | Yamaha | YZF-R1 LE |
| 1995-2007 | Yamaha | YZF600R |
| 1994, 1996-1998 | Yamaha | YZF750R |
Once your Steel Steeds gear leaves our warehouse, it typically arrives at your doorstep within 2–4 business days, unless otherwise noted. We partner with trusted shipping carriers to ensure your off-road essentials get to you fast and hassle-free. So gear up with confidence—your next big adventure is just around the corner!
Changed your mind? No problem. Most new, unused, and uninstalled items can be returned within 30 days of delivery.
We do not charge a standard restocking fee. Customers are responsible for return shipping unless the item arrived damaged, defective, or incorrect.
Items must be returned in original packaging and in resalable condition.
We are committed to providing quality products and stand behind our items with a warranty. Exact coverage may vary, so please refer to our warranty page for more details!
