3 inch DP vs. 4 inch DP for 335i?
BMS makes a 4 inch DP and Challenge, just to name one has a 3 inch DP. Which one is better for the F30 335i?
This is just about 3 inches vs. 4 inches. I know catless and high-flow cats play apart in the decision but lets save that for a later time.
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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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