Everything I need for 3.4 pulley??

**jetfighterv** · 03-01-2018

Okay so I have a 2001 gtp it is completely stock as I know except for a thrasher cold air intake. What all will I need to upgrade when I put a 3.4 supercharger pulley on it? Thanks

**Fivefingerdeathpunch** · 03-01-2018

All the info is out there, plenty of threads asking this same exact question.

If you ask the crowd most will say 1-2 steps cooler spark plugs, plog/downpipe combo or headers and a tune.

**BrandonHall10** · 03-01-2018

And scan it for knock.

**Impala131** · 03-02-2018

Originally Posted by BrandonHall10

And scan it for knock.

This is most important. My 99 GTP had headers, 180 thermostat, intake and 104 plugs, and still had KR on a 3.4 pulley. My car ran a lot better on a 3.6 pulley. I could make a 3.4 work with a tune, but the 3.6 plus added timing was waaaay better.

**jetfighterv** · 03-02-2018

Originally Posted by Impala131

This is most important. My 99 GTP had headers, 180 thermostat, intake and 104 plugs, and still had KR on a 3.4 pulley. My car ran a lot better on a 3.6 pulley. I could make a 3.4 work with a tune, but the 3.6 plus added timing was waaaay better.

Good to know thanks!

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