is this fit to mazda6 3.7L v6 2012 ?

Bosch 6728 is the correct spark plug for a 2012 Mazda 6 3.7l v6.

Will these plugs work in a 1984 chevy g20 full size van with a 350 motor?

no use 6712. 6728 are not correct

What is the gap on this ?

I don't know if this helps you, I use it for my Ford f150 pick up and it works great.

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⚡ Ignite your drive with Bosch’s platinum precision!

PRECISION IGNITION - 360° laser-welded fine wire platinum firing pin ensures superior ignitability and performance
PLUG PLAY UPGRADE - Factory pre-gapped for hassle-free installation—get back on the road faster
DOUBLE THE DURABILITY - Yttrium-enhanced ground electrode delivers 2X longer life than copper plugs
FLASH OVER PREVENTION - Ribbed insulator design seals tightly to prevent misfires and boost reliability
CORROSION PROOF THREADS - Nickel-plated rolled threads resist corrosion—no anti-seize needed

Bosch 6728 OE Fine Wire Platinum Spark Plug offers a cutting-edge yttrium-enhanced electrode and 360° laser-welded platinum firing pin for twice the lifespan and superior ignition. Featuring nickel-plated corrosion-resistant threads and a ribbed insulator to prevent misfires, this pre-gapped spark plug ensures effortless installation and reliable performance across a wide range of vehicle models.

Reviews

D**Y

Came with damaged packaging

The boxes came very damaged. Looked like they had gotten wet. The plugs worked fine. Not worth the 9.00 each I paid for them.

18.03.2023

A**M

No packaging

Came loose in padded mailer. Seems weird to me but my car starts so I can't complain.

25.09.2019

K**S

Excellent

Good

31.08.2019

S**R

👍

Good product

13.01.2019

B**L

Five Stars

Good price!

30.07.2015

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KSh4532

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Brand	Bosch Automotive
Core Material	Platinum
Top Material Type	Nickel
Vehicle Service Type	Car
Global Trade Identification Number	00028851019903
UPC	028851019903
OEM Part Number	6728
Manufacturer	Bosch Automotive
Model	Spark Plug
Item Weight	1.76 ounces
Product Dimensions	4.02 x 1.06 x 0.94 inches
Item model number	6728_1
Exterior	Machined
Manufacturer Part Number	HR7MPP30X

BOSCH 6728 OE Fine Wire Platinum Spark Plug - Single

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