JJsQwuik

iTrader: (17)

I needed to know what should I gap my tr55 spark plugs too, I have an 02 z28 A4 with long tubes, ory, cat-back , lid and p&p throttle body with mass... What was the best gap that worked for you???? Thanks

conan

iTrader: (5)

Tr55's gap them to .055.

Mr. Trick

iTrader: (19)

+1 for the .55, my car is cam only with full bolt ons and thats what I gap mine at.

01'SSLSX

spark plugs come pre-gapped now. u dont have to re-set it. they come at .060 stock

but going to .055 will be just fine

01ssreda4

iTrader: (96)

IMO anywhere between .050 and .060 is fine

PowerShift408

iTrader: (44)

I gap mine to .045.

02CamaroSSLE

iTrader: (5)

i wouldnt worry about gapping them... arent the iridiums plugs easy to break the tip off?

LS6427

iTrader: (2)

For a N/A engine:

You'll have no difference in performance anywhere from .040 - .060.

So use .050....right in the middle of the working range. I've tried all different gaps, nothing at all changes in the least. I tried them all when 100% stock and with my 427ci stroker......same performance.

.

slt200mph

iTrader: (42)

If my memory serves they come gapped at .055 .... that gap will work just fine.

Skidog5150

iTrader: (2)

.55 gap on mine..

99blancoSS

iTrader: (115)

.051 -055

INTENESS

iTrader: (4)

They come gapped at .055 but always check em to see if any any got changed.

Skidog5150

iTrader: (2)

I thought they came at .060

the.palmetto

iTrader: (2)

My manual says .06 but you're good with whatever they're pre-gapped at. I posted this elsewhere, but would worn out plugs cause problems with more advanced timing during tuning? Such as outright refusal to go past a certain RPM at WOT? My car is 100k miles and don't think the plugs ever been changed