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Spark Plug Information
While looking for spark plugs for my Vortec heads I ran into this AC chart and thought I would share. I had been using to short a plug in mine and found that the Vortec heads (iron) need the LTS style.
R - Resistor
4- 14mm thread
3- heat range
LT - Long reach, .715" (18.16 mm), Tapered Seat
T - Tapered Seat Shell Design
TS - Tapered seat with extended tip
LTS is a long reach tapered seat plug with a extended tip.
TS it a tapered seat plug with a extended tip.
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