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Discussion Starter #1
i have a 5 speed spi and was just wondering where everybody shifted at..and where the spi made most of its hp
 

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You can run it to redline.

The SPI makes most of it's power at idle.
 

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FF Cleaning Squad
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I know of a guy who beats on his SPI like a mad man and shifts all the way to 7000 and it still has not blown.

I suggest you get on a dyno and find where you max power is made at.
 

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X2.
Power really starts to go down past that.
true!
with a header and no cat, I reach 6000 on track, but when I was stock past 5000 it was dead!
 

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Discussion Starter #8
wow thats great guys ..i was scared to go past 4 becuse my old truck redlined at 4 i think
 
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