New colder plugs a good idea with Racechip?

hunter8793 · Today, 09:28 AM

Are these NGK one step colder plugs a good idea if I'm going to use a Racechip GTS? 2021 Comp 30k miles. No plug replacement history on Carfax.

part#97506S8KT

Thanks.

quadcammer · Today, 01:02 PM

Yes

Holset · Today, 02:50 PM

NO!

Doctor X · Today, 06:32 PM

Quote:

Originally Posted by Holset

NO!

why not?

pbonsalb · Today, 10:14 PM

They actually are not one step colder for the S63TU4; they are the same as stock for this motor. They are less expensive replacement plugs. Replacing original plugs with new ones is a good idea depending on how many miles the car has — the factory change interval is 37k miles. A mild piggyback tune like Racechip does not require any mods. If you had a stage 2 flash tune instead, reducing the plug gap by a few thousandths may help.

Today, 09:28 AM	#1
hunter8793 Private First Class 95 Rep 134 Posts Drives: 2021 M5 Join Date: Aug 2022 Location: Arkansas iTrader: (0)	New colder plugs a good idea with Racechip? Are these NGK one step colder plugs a good idea if I'm going to use a Racechip GTS? 2021 Comp 30k miles. No plug replacement history on Carfax. part#97506S8KT Thanks.
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Today, 01:02 PM	#2
quadcammer Private 38 Rep 58 Posts Drives: LCI F90 Comp Join Date: Sep 2017 Location: nj iTrader: (0)	Yes
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Today, 02:50 PM	#3
Holset Captain 309 Rep 697 Posts Drives: F90 M5 Comp LCI Join Date: Feb 2012 Location: Sweden iTrader: (0)	NO!
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Today, 10:14 PM	#5
pbonsalb Lieutenant General 5724 Rep 11,240 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	They actually are not one step colder for the S63TU4; they are the same as stock for this motor. They are less expensive replacement plugs. Replacing original plugs with new ones is a good idea depending on how many miles the car has — the factory change interval is 37k miles. A mild piggyback tune like Racechip does not require any mods. If you had a stage 2 flash tune instead, reducing the plug gap by a few thousandths may help.
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