You are not signed in. Sign in.

Auto Parts War: Find discount auto car parts, used, aftermarket and new.

Auto Parts War » Bosch » Bosch (7421) HR9LI33U 21 PlatinumIR Fusion Spark Plug - Pack of 1

Other Parts by Makes

Best Prices: Bosch (7421) HR9LI33U 21 PlatinumIR Fusion Spark Plug - Pack of 1 » Bosch

Compare prices and find the best price (cheap discount price) of the auto part Bosch (7421) HR9LI33U 21 PlatinumIR Fusion Spark Plug - Pack of 1 by the part number 7421, BS7421 from a variety of different online car part stores and dealers.

Find Best Prices for This Part »

Part Name: Bosch (7421) HR9LI33U 21 PlatinumIR Fusion Spark Plug - Pack of 1
Part Number: 7421, BS7421
Part Brand: Bosch

Part Image / Picture

Bosch (7421) HR9LI33U 21 PlatinumIR Fusion Spark Plug - Pack of 1 (7421, BS7421)

Part Description & Details

Bosch combines the best features of their +4 plug with the advantages of iridium. The Bosch PlatinumIR Fusion plug fuses iridium with platinum, combining the superior properties of both materials into a single fine wire center electrode.  Additionally this plug uses surface air gap technology and 4 yttrium enhanced ground electrodes for both performance and extra long life. The fine wire iridium and platinum center electrode (which is heat fused into the extended ceramic insulator) reduces the voltage necessary to jump the gap as well as reduces quenching.  The 4 ground electrode design not only provides multiple radial spark paths, but also the surface air gap design creates optimal exposure of the air and fuel mixture to the enhanced ignition spark. The combination of an iridium and platinum center electrode and the yttrium -enhancement of the ground electrodes even further extends plug life. This plug is designed to give exceptional performance, reach self cleaning temperature faster for quicker starts, smoother acceleration and increased fuel efficiency.

Features:
  • Platinum heat-fused center electrode for longer service life
  • Finewire design requires lower ignition voltage for reliable cold weather starting and superior operation under all driving conditions
  • Yttrium enhanced copper core tapered v-profile ground electrode provides extended service life and improved access to air-fuel mixture
  • 14mm Thread Size
  • 16mm Hex Size

Vehicles & Years

  • 2004-2007 Cadillac CTS
  • 2008-2008 Cadillac DTS
  • 2004-2005 Cadillac DeVille
  • 2003-2007 Cadillac Escalade
  • 2008-2008 Cadillac SRX
  • 2007-2008 Cadillac STS
  • 2003-2003 Cadillac Seville
  • 2002-2006 Chevrolet Avalanche 1500
  • 2003-2005 Chevrolet Avalanche 2500
  • 2002-2005 Chevrolet Blazer
  • 2000-2001 Chevrolet C-Series Kodiak
  • 2000-2000 Chevrolet C2500
  • 1999-1999 Chevrolet C2500 Suburban
  • 2000-2001 Chevrolet C3500
  • 2003-2007 Chevrolet C4500 Kodiak
  • 2003-2007 Chevrolet C5500 Kodiak
  • 2005-2008 Chevrolet C6500 Kodiak
  • 2005-2008 Chevrolet C7500 Kodiak
  • 1999-2002 Chevrolet Camaro
  • 2002-2004 Chevrolet Cavalier
  • 2005-2005 Chevrolet Classic
  • 2005-2005 Chevrolet Cobalt
  • 2004-2004 Chevrolet Colorado
  • 2001-2006 Chevrolet Corvette
  • 2005-2005 Chevrolet Equinox
  • 2000-2008 Chevrolet Express 1500
  • 2000-2008 Chevrolet Express 2500
  • 1999-2007 Chevrolet Express 3500
  • 2003-2008 Chevrolet Impala
  • 2000-2000 Chevrolet K2500
  • 1999-2000 Chevrolet K3500
  • 2002-2005 Chevrolet Malibu
  • 2003-2003 Chevrolet Monte Carlo
  • 2004-2004 Chevrolet Optra
  • 1999-1999 Chevrolet P30
  • 2004-2004 Chevrolet S10
  • 2004-2005 Chevrolet SSR
  • 2000-2008 Chevrolet Silverado 1500
  • 2002-2003 Chevrolet Silverado 1500 HD
  • 1999-2002 Chevrolet Silverado 2500
  • 2001-2008 Chevrolet Silverado 2500 HD
  • 2004-2007 Chevrolet Silverado 3500
  • 2007-2007 Chevrolet Silverado 3500 HD
  • 2000-2007 Chevrolet Suburban 1500
  • 2002-2007 Chevrolet Suburban 2500
  • 1999-2008 Chevrolet Tahoe
  • 2002-2004 Chevrolet Tracker
  • 2004-2004 Chevrolet Trailblazer
  • 2005-2005 Chevrolet Uplander
  • 2002-2002 Chevrolet Venture
  • 1999-2008 Chevrolet W3500 Tiltmaster
  • 1999-2005 Chevrolet W4500 Tiltmaster
  • 2001-2001 Chevrolet W5500 Tiltmaster
  • 2000-2002 GMC C-Series Topkick
  • 1999-1999 GMC C1500
  • 1999-1999 GMC C1500 Suburban
  • 2000-2000 GMC C2500
  • 1999-1999 GMC C2500 Suburban
  • 2001-2001 GMC C3500
  • 2004-2004 GMC C4500 Topkick
  • 2004-2004 GMC C6500 Topkick
  • 2004-2005 GMC C7500 Topkick
  • 2004-2004 GMC Canyon
  • 2003-2009 GMC Envoy
  • 2004-2004 GMC Jimmy
  • 2000-2000 GMC K2500
  • 1999-1999 GMC P3500
  • 2002-2005 GMC Safari
  • 2001-2007 GMC Savana 1500
  • 1999-2004 GMC Savana 2500
  • 1999-2007 GMC Savana 3500
  • 1999-2008 GMC Sierra 1500
  • 2001-2007 GMC Sierra 1500 HD
  • 1999-2004 GMC Sierra 2500
  • 2001-2004 GMC Sierra 2500 HD
  • 2006-2007 GMC Sierra 3500
  • 2007-2008 GMC Sierra 3500 HD
  • 2002-2006 GMC Sierra Denali
  • 2003-2003 GMC Sonoma
  • 1999-2003 GMC W3500 Forward
  • 1999-2005 GMC W4500 Forward
  • 2001-2004 GMC W5500 Forward
  • 2000-2006 GMC Yukon
  • 2002-2006 GMC Yukon Denali
  • 2001-2005 GMC Yukon Denali XL
  • 2000-2005 GMC Yukon XL 1500
  • 2001-2004 GMC Yukon XL 2500
  • 2006-2006 Hummer H1
  • 2007-2007 Hummer H2
  • 2008-2008 Saab 9-7x

 

Browse Other Parts

By Year

By Category

By Make

See the right sidebar.




No comments yet. Submit yours!



Feel free to comment on this one.

We would like to know what you think about this one and publish your thoughts or reviews here! (top)

What say you?

  1. You may optionally give a title for this comment.

  2. Worst to best, 1 to 5, what would you rate this one?

  3. The actual content of your comment. No HTML nor whatsoever allowed.

  4. The author of this comment.

  6. 9 + 1 = ?

    Please answer the question by common sense.

Copyright © 2010 - 2024 Auto Parts War, AutoPartsWar.com. All rights reserved. We respect your privacy.
We are affiliated with Amazon for some products. We earn a commission if you purchase through our site.