The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

68Gold/white · 03-22-2018, 08:09 PM

A tapered seat plug would likely be a R44T or R44TS.... the "T" is for tapered seat. Not trying to be a Beavis, here, just help.

They no longer make any gasket R44 plugs, it's either R43 or R45. The R43 is a cooler plug than a R45, and does NOT have the extended tip.

My engine builder never recommended extended tip plugs. I still trust his thinking, many will disagree...

If the engine is in good condition and runs well, I'd use R43 plugs. If it's a little lacking power wise, not in best condition, I'd go R45.

THe extended version of these 2 plugs has an "S" at end, R43S, R45S, if that's what you want...

03-22-2018, 08:09 PM	#2
68Gold/white Registered User Join Date: Sep 2011 Location: Ark City, Kansas Posts: 3,271	Re: Correct plugs for 041 heads with hei A tapered seat plug would likely be a R44T or R44TS.... the "T" is for tapered seat. Not trying to be a Beavis, here, just help. They no longer make any gasket R44 plugs, it's either R43 or R45. The R43 is a cooler plug than a R45, and does NOT have the extended tip. My engine builder never recommended extended tip plugs. I still trust his thinking, many will disagree... If the engine is in good condition and runs well, I'd use R43 plugs. If it's a little lacking power wise, not in best condition, I'd go R45. THe extended version of these 2 plugs has an "S" at end, R43S, R45S, if that's what you want...