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I am building a tt5 car and will use a 106mm turbo. Which housing trim and AR ratio would be best for a 431ci sbf? Will use 2" headers with 3" crossovers. Thanks
 

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you need to use a 1.32 a/r turbine,that what we used on Phil's car,106 on a 438 lsx engine.been 7.68 on radials so it's working pretty well.I can get you a killer price on a Precision 106
 

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Garrett 106 with 1.32A/R -G-trim. That should take care of it...
 
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