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There's alot of shops you can visit down here for a tune. There's Inline Racing, D3 Performance, Serious HP, Latemodel Racecraft, Jtran, EVS Motors, and alot more.

Personally I would go with the first two choices, Inline Racing actually has experience with the IS300 since they built one for a customer that's currently trying to beat SRT's record for the world's fastest IS.


The Quest for 10.2: Anthony’s Drag IS300 | SOUTHRNFRESH

My second choice would be D3, they do great work and they actually built my friend's S2000, but they're more pricey than Inline. However they deal with high horsepower Supras all the time so they have plenty of experience with the 2JZ.

D3 Performance Engineering ProEFI Authorized Dealer and Tuning - Research and Development, Product Design and Manufacturing, Engine Management and Tuning
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