ACCEL8199 HP Copper Spark Plug - Shorty

Tried to find these in local auto parts store to no avail. Good price and exactly what he needed.

These plugs topped off the tune-up nicely, 5.0 running strong...

---I ordered two kits/sets of these plugs and they were the wrong plugs, The box is clearly labeled that the 8199 kit is plug number 0576S. Amazon said they were working on finding a solution to this problem, but it is not just on Amazon where this screw-up/misprint is found. I have found this error on 4 different part sites and after a little research, I found a solution for us.---If you are looking for 0437S plugs, you will need the 8197 kit. If you are looking for 0576S plugs, you will need the 8199 kit. As stated in this review, the 8199 kit contains 0576S plugs, not 0437S plugs, as the tile an description of the product states.---I bought the 8197 plugs for my 1968 International Harvester 304cid engine. FWIW, the 0437S plugs cross over to Champion RJ12YC and Autolite 85s. The correct Autolite plug for the International SV8 is #85. I know, I know, the books say it is #303, but 90% of the people who have used the 303s can vouch that they are not the right plug and they foul out quickly. From what Autolite says, the 303 is a standard plug and the 85 is the extreme condition plug. I also have had better luck with the 85s, which is what led me to the Accel 0437S plugs. The 0437S plugs have shown to be great so far.---One more thing that makes this misprint a big boo boo, is that the 0576S plug is a 5/8" hex with tapered seal. The 0437S has a 13/16" hex and a tapered crush-washer gasket, which as you know is what must be used when substituting say, Champion's RJ12YC plugs. So again, the 8199 kit contains 0576S, what you don't want for replacing Champion RJ11Y / RJ12Y / RJ12YC, Autolite 85 , NGK BPR5S / XR4 /XR45 / XR5 , Prestolite 14R42 , Motorcraft 14R42 , AC R44S , Bosch WR8F / WR8FC or Old Autolite ARF52B / ARF42B . If replacing these plug numbers, you will want Accel kit #8197, which contains eight 0437S plugs.

Used for a big block Chevy engine in a 1972 Nova with headers. Cleared the headers just fine and the heat range is about perfect for a daily driver. Clean fuel burning. I would use these again.

Product is as listed. To clear some headers these are a much. These plugs should fit all small block chevy engines such as the 305, 327, 350. These are one of the hotter burning accel short plugs. I run a msd ignition and they handle the extra voltage just fine.I have no problem with this product. It is suitable for stock engine and higher horsepower engines as well.

Bought them for 1999 ford f150 because they were suggested as fit for my truck, they are not, they are too short

Best Spark plug ever for 1976 lincoln contenintal 460 7.5L all black smoke gone with top performance , really really recommended .. 3 months with many issues I thought my engine is broken or the carb got bad ,, all issues become when i change to NEW spark plugs it was genuine Motorcraft but it was long one so many many smoke comming and the car was in the worst shape not working well until i change the sparks today and everything back to be amazing again :) thanks amazon for this sparks and keep it always available..

Have these plugs in two Ford 302 V8 with headers. I would recommend!

Good product, easy to install . Engine runs perfect . More clearance between headers to plug wires

Spark plugs going into a hot rod application with very little clearance. These plugs fit beautifully and work well. Highly recommended.

Runs Awsome great plugs

Looks very good and works great

Great price and super service.