ACDelco 41-993 Professional Iridium Spark Plug

These are Iridium tipped spark plugs that do not increase the spark gap as they are used. They were pre-gapped at 60 thousandths of an inch, (1.5mm). they are installed in a 5.7L GM Vortec motor. I expect these spark plugs to last longer than me.

I only got 3 spark plugs instead of 4. I need one more for my order. The same kind please.

Purchased for boat

These fit my 97 Silverado 5.7 perfectly and it runs great. They came pre gapped but I checked them anyways and they were within spec.

Olds spark plugs haven’t been changed since 2010 found that out after finding some service records written under the hood of my blazer. So I popped one out and it was obvious they were actually 12 years old so we ordered these. Truck has never run better

A un excelente precio

Used 16 of these to tune up the 5.0 Mercruisers in our boat. Perfect fit of course, but also helped smooth the idle, starts up with far less cranking over, and boats typically run rich at idle, but there is noticeably less fumes as it warms up. Nice plugs at an excellent price. Would buy again for any small block chevy install!

What is going on here Amazon!? Your description CLEARLY states Pack of 8! Not so fast, I only received a pack of 4! I realize the great deal for 8 plugs but I didn't make that statement, You did! I had to reorder the product again to have 8 spark plugs for my Silverado, I feel like I got had by Amazon! The product is fine and the delivery service was great! Reached Amazon customer service and the representative told me that indeed the second order would contain spark plugs and I could return the first 4! LOL! NOPE, RECEIVED 4!Somebody, needs to correct the online info stating a pack of 8 to 4. Very misleading and misrepresenting the product which leads to aggravation!

The media could not be loaded.  Excelentes bujías de iridio, calidad premium de General Motors, vienen grabadas en el metal de la bujía con la leyenda: ensambladas en U.S.A. con partes japonesas.Cada paquete contiene 4 bujías, pedí 3 paquetes para tener 12 bujías en total.Funcionan de maravilla en mi Chevrolet Astro 2003 AWD, motor Vortec 4.3Son originales, premium y de excelente calidad, las recomiendo ampliamente.

I searched quite a bit for the proper spark plugs for my 1997 Chevrolet Pickup 5.7L V8 and found these to be the very best ones that I could use. Basically the OE spark plugs that GM used originally in the engine, with the iridium upgrade. I could tell right away after firing up the truck and the engine idling that I picked the right ones. It's never run better. I recommend these for a GM 5.7L "Vortec" engine, I believe from 1994 to 1998.

I bought a couple 4 packs for $35 each. I used them on a brand new GM 350 crate engine, gapped to .045 and the engine started fine and runs great!At time of review though these have shot up to $70 per pack! Not sure I would have bought them at that price.

ACDelco never fails to disappoint.

Item worked perfectly.