No hassle
Live in-stock
Save over
60% retail
You have no items in your shopping cart.
02/22/2030 4:18 PM
Sale Price $7.00
3 left at this price
Usually delivered within 2 days
Usually delivered within 2 days
Part number: 4478
Product Details
Bosch 4478 WGR8DQP Platinum +4 Spark Plug, Pack of 1
Products specifications
Electrode Core Material Copper
Electrode Tip Material Platinum
Ground Strap Quantity Four
Manufacturer Heat Range 8
Quantity Sold individually.
Resistor Yes
Shorty Spark Plug No
Spark Plug Reach 0.708 in.
Spark Plug Seat Style Tapered
Spark Plug Thread Size 14mm
Wrench Diameter 5/8 in.

Bosch Platinum+4 spark plug has unique revolutionary firing technology combining the advantages of surface air gap technology, nickel-yttrium four ground electrodes and a heat-fused center electrode with pure platinum providing optimum engine performance, smoother acceleration and top fuel efficiency.

  • Provides ease of installation - never requires adjustment
  • Never requires gapping, the electrode gap is factory-set and never requires adjustment
  • Electrode gap is factory set to provide ease of installation - never requires adjustment
  • Four yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
  • Revolutionary surface air gap firing technology featuring four yttrium-enhanced ground electrodes delivers the longest, most powerful spark for ultimate engine performance
Add your review
Very simple.
Quick response to customer question and great customer service. Will be back to purchase from again
Great service!
Show All Reviews
BMW 325i
1992 BMW 325i ALL / Base
1991 BMW 325i ALL / Base
1990 BMW 325i ALL / Base
1989 BMW 325i ALL / Base
1988 BMW 325i ALL / Base
1987 BMW 325i ALL / Base
BMW 325is
1991 BMW 325is ALL / Base
1990 BMW 325is ALL / Base
1989 BMW 325is ALL / Base
1988 BMW 325is ALL / Base
1987 BMW 325is ALL / Base
BMW 325iX
1991 BMW 325iX ALL / Base
1990 BMW 325iX ALL / Base
1989 BMW 325iX ALL / Base
1988 BMW 325iX ALL / Base
BMW 525i
1990 BMW 525i ALL / Base
1989 BMW 525i ALL / Base
BMW 528e
1988 BMW 528e ALL / Base
BMW 535i
1993 BMW 535i ALL / Base
1992 BMW 535i ALL / Base
1991 BMW 535i ALL / Base
1990 BMW 535i ALL / Base
1989 BMW 535i ALL / Base
BMW 635CSi
1989 BMW 635CSi ALL / Base
1988 BMW 635CSi ALL / Base
Show All Vehicle Fitments
Return Policy
Returns are easy at THMotorsports
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy