Brisk Iridium Performance Spark Plug Set (4 pcs) 2014-2019 Fiesta ST *FREE SHIPPING*
NEW PRODUCT ALERT!
Brisk Iridium Performance RR14BYIR-7
You've asked and we've listened. Introducing a new part number in our Iridium Performance P+ line.
This is a one heat range colder than factory plug that is a direct replacement for NGK 6510 & Motorcraft SP-542
The RR14BYIR-7 come factory pre-gapped at .030 which is a perfect drop in replacement for the stock plugs. We suggest selecting custom gaps of .028 for tuned stock turbo applications and .025 for turbo upgrade applications
RR14BYIR-7 has been optimized for turbocharged use with a beefier insulator and fine wire construction, it offers excellent performance and a longer lifespan than our Silver Racing equivalent.
Customer Reviews
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Customer Reviews
Excellent. Product thank you woosh
Very happy with product. Well package.
Thanks woosh motorsport for give us the best quality.
The engine runs smoother. I have a few bolt-ons, and can tell it has better pull. Butt dyno approves, so I definitely recommend these and will buy them again. Thanks, Whoosh, for the fast shipping and great packaging.
I installed these 9,000 miles ago along with my Whoosh V3 FMIC and a 91 tune from Dizzy Tuning! These have been fantastic plugs so far which includes a 2 week, 5,000 miles road trip across the country from AZ to VA and back to AZ. My engine runs great and never misses a beat! Would definitely buy another set!
I agree with the reviews below, I bought them gapped at .28 and man my car feels smoother at highway speeds, idle and start up are better as well. was a NGK fan but these really did make a night and day difference