Overall rating 
3.8 / 5
3.8 / 5
Appearance 
5 / 5
5 / 5
Ease of Use/Installation 
4.7 / 5
4.7 / 5
Quality/Construction 
4.6 / 5
4.6 / 5
Performance 
5 / 5
5 / 5
51 out of 68(75%)reviewers recommend this product.
Product ReviewsWrite a review
Overall rating 
4 / 5
4 / 5
fromFresno, CA, USA
How often do you shop at JC Whitney.com?Multiple Times a Year
Perfect!
PostedApril 6, 2015
So far so good... perfect fit for my Honda Civic 2007
Overall rating 
5 / 5
5 / 5
great product
PostedFebruary 22, 2015
have been using these plugs for years in all of my non-overhead cammed engine, they just dont seem to agree with the overhead engines but are excellent in anything else. always have saw slight fuel milage gains and noticable throttle responce. i do think that its odd that the plugs are different prices on this site for different part numbers, whereas on other sights, every plug is the exact same price ($5.99)
Overall rating 
5 / 5
5 / 5
fromCentral, Minneapolis, MN, USA
How often do you shop at JC Whitney.com?Multiple Times a Year
Very good plugs
PostedJanuary 13, 2015
I like the design and results from Diamond Fire plugs. Pre set gap and great design make them good purchase. Improved performance and smooth running engine was exactly what I was looking for. The plugs did both.
Overall rating 
5 / 5
5 / 5
fromDexter, ME, USA
How often do you shop at JC Whitney.com?Multiple Times a Year
I am impressed
PostedNovember 15, 2014
Not much for gimmicks, but I think these plug got me about 2 mpg, and a little more power
2 of 4 found this review helpful.
  • 2016-04-29 T22:19:47.742-05:00
  • bvseo_pps, prod_bvrr, vn_prr_5.6
  • cp-2, bvpage2n
  • co_hasreviews, tv_68, tr_68
  • loc_en_US, sid_19573G, prod, sort_default