NGK TR5 or TR55???

[MIGS]

Im about to order new plugs for my 01 tahoe 5.3.

I searched posts re NGK plugs but whats the difference between the NGK tr5(part #2238) and tr55(part#3951)?

advance lists tr5s for my truck.

summit lists tr55s for my truck.

thanks in advance.

 

[BigE]

tr5..14mm Thread, 17.55mm (.691") Reach, 5/8" (16mm) Hex Size, Tapered Seat, Resistor, Removable Terminal, Projected Tip, V-Power (V-Grooved Centere Electrode), .040" (1.016mm) Gap, Heat Range 5

tr55..14mm Thread, 17.55mm (.691") Reach, 5/8" (16mm) Hex Size, Tapered Seat, Resistor, Removable Terminal, Projected Tip, V-Power (V-Grooved Centere Electrode), .060" (1.5mm) Gap, Heat Range 5

 

[MIGS]

thanks...i went for the tr5's with the.040 gap

 

[YNOT]

i just walked into o'reilys and asked for .040 gapped ngk's

 

[BOSS]

Check the gaps....30% of the time they are off!

 

[BigE]

thanks...i went for the tr5's with the.040 gap

no problem. will be the same ones i will get as soon as i have $$$ + MSD wires

 

[tybardy]

no shit.... this is a helpfully piece of info because when i bought my hoe i picked up the 55's and gapped em myself to .040...

 

[withac]

My 55's were all gapped correctly. In fact, the manufacturer says not to try and re-gap them as you can damage the tiny center electrode. And I'm pretty sure they came .040