Spark Plug Lengths - shorty's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DKSpringer · 10-30-2018, 11:30 PM

Read lots of conflicting info on forums from past posts, so I thought I would share some details. I have some cheap Chinese headers, and they don't have the best plug clearance. Here is a photo of the different length spark plugs commonly mentioned for small block Chevys. We have:
ACDelco 41-905
Autolite 145
NGK YR5
Champion RV92YC
Accel header plugs 0576S

Accel are the shortest, Champion are not far behind at a lower cost.

Hope this helps someone!

10-30-2018, 11:30 PM	#1
DKSpringer Registered User Join Date: Nov 2014 Location: Cedar Falls, IA Posts: 49	Spark Plug Lengths - shorty's Read lots of conflicting info on forums from past posts, so I thought I would share some details. I have some cheap Chinese headers, and they don't have the best plug clearance. Here is a photo of the different length spark plugs commonly mentioned for small block Chevys. We have: ACDelco 41-905 Autolite 145 NGK YR5 Champion RV92YC Accel header plugs 0576S Accel are the shortest, Champion are not far behind at a lower cost. Hope this helps someone! Attached Images



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