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Just talked to a buddy who owns a car shop that builds a lot of cars and he says sticking to a 3 inch catless dp is better than going to a 4 inch dp in terms of making power on a stock turbo.
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'02 TS E46 330xi - SOLD
'06 SGM E90 325i - SOLD
'13 AW F30 335i ///M-Sport 6MT. OEM(+) - SOLD
'20 AW F87 X3MC - Sold
Current: `23 Chalk G80 M3CX | Ordered: '24 M3CS - Week37 build.
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