E46, Z4 Differential Upgrade - (NO LONGER AVAILABLE)

Product Details

The 3.07 differential is an Original BMW part and used on the 330i ZHP Performance Package (manual transmission). This is a complete, fully-built differential that is a direct replacement swap for the stock 330i/ci 2.93 diff. On other models (323/325/328, Z4) you will need the 330's output shaft flanges (easy to install). You can find used output flanges online or we can sell you new flanges. The 3.07 gearing is 5% shorter than the stock 2.93 and will give a modest improvment in acceleration. Having the shorter ratio will put you in a better part of the RPM band for any given speed. This makes the car instantly quicker with more power and torque on tap. There's almost no downside aside from the higher revs will decrease fuel economy. Jumping from 2.93 to 3.07 is not a drastic change and was used by BMW to sell the ZHP package as a faster car than a standard 330i. For even better acceleration, try the 3.46 or 3.64 options in our custom differentials. The custom diffs will also give you a limited-slip option (this ZHP diff is still an open style).

This is an Original BMW part and carries the same BMW two year warranty as any other new BMW part. A core charge is required that can be refunded when your original diff is returned.

Example: 2002 330i, 5-speed manual, 245/40-17" rear tires
Gear Ratio	Gear	Speed	RPM
2.93	4th	40 MPH	2,000 RPM
3.07	4th	40 MPH	2,050 RPM
2.93	5th	70 MPH	2,800 RPM
3.07	5th	70 MPH	2,900 RPM
3.07	5th	144 MPH*	6,000 RPM
* - Theoretical speed for 3.07 gears at 6,000 RPM. It doesn't mean this speed is actually attainable. It's only offered for reference.

This item fits the following BMWs:
2001-2006 E46 BMW 330i 330ci 330xi, with manual transmission
1999-2006 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci (requires 330 output flanges)
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si (requires 330 output flanges)

Product Q&A

Lifetime Replacement