DBA Disc Part Numbering System


DBA has designed an intuitive numbering system that allows the same underlying part number to be carried through the different DBA rotor series and disc styles.

All disc part numbers will begin with “DBA”, a number prefix is then used to denote the Series, while Suffux’s are used to denote the style.

A part number will be assigned a base part number for a Street Series disc. E.g. DBA040.

Though the addition of prefixes and suffixes, you will be able to easily identify which product number you are after. A part number may have more than one suffix if it has multiple features.

Part number Series

Base part number   Performance Series

D B A    0 4 0

Street Series

D B A 4 0 4 0

4000 Series

D B A 5 0 4 0

5000 Series

The suffix that is applied to a part number may be unique to that series, so it is important to view the whole part number. i.e. a slotted suffix (S) in Street Series is for a T2 slot, where a slotted suffix (S) in 4000 Series and 5000 Series is for a T3 slot. A full list of part number suffix’s is presented below by Series.

The numbers represent the rotor’s base part number, while the suffix ‘letter’ denotes the rotor’s style.

Base part number   Style of Rotor

D B A    0 4 0



DBA Part no. Base number Suffix Disc Style
DBA040 DBA040 none Plain face
DBA040S DBA040 S Slotted (T2 pattern)
DBA040X DBA040 X Cross-drilled & dimpled
DBA040E DBA040 E En-Shield
DBA040ES DBA040 E, S En-Shield & Slotted (T2 pattern)

These part numbers start with the prefix number ‘4’ with a suffix ‘letter’ determining the rotor style.

Base part number   Style of Rotor

D B A 4 0 4 0



DBA Part no. Base number Suffix Disc Style
DBA4040 DBA040 none Plain face
DBA4040S DBA040 S Slotted (T3 pattern)
DBA4040OESL | OESR DBA040 OESL or OESR Left or right slotted (OE pattern)
DBA4040CSL | CSR DBA040 CSL or CSR Left or right slotted (Curved pattern),
DBA4040XS DBA040 XS Cross-Drilled & Dlotted
DBA4040BLKXS DBA040 BLK, XS Black hat, Cross-Drilled & Slotted
DBA4040XD DBA040 XD Cross-Drilled & Dimpled
DBA4040W DBA040 W Wave Design

5000 series rotors follow DBA’s 4000 series numbering system with the number prefix of ‘5’, however 5000 series rotors have 2 unique aspects:

  • 5000 series rotors are a 2-piece design (Aluminium hats and cast iron rings). As such they are available as a complete assembly ready for direct replacement, or the hat or flat discs (rings) available separately.
  • 5000 series rotors are often available with different coloured hats

When sold as individual components, it is important to note that the rings (flat discs) will start with a suffix of ‘.1’, hats will start with a suffix of ‘.2’, while a complete assembly will not have either ‘.’ Suffix.

In a complete assembly or ‘.2’ hat replacement only, the hat colour will be included in the part number.

Base part numbers   Description

D B A 5 0 4 0

Complete assembly

D B A 0 4 0.1

Flat Disc only

D B A 0 4 0.2

Hat only

5000 series part number structure

DBA 5000 series part numbers are composed in a strict order

Base Part Number Assembly type Wave? Hat colour Style Complete DBA part number
DBA5040 .1 n/a* S DBA5040.1S
DBA5040 .2 SLV n/a** DBA5040.2BLK

*Note: a flat disc (ring) part number ‘.1’ will not have a hat colour associated with the part number
**Note: a hat part number ‘.2’ will not have a disc style associated with the part number

Hat colours

DBA Part no. Suffix Colour
DBA5040BLK BLK Black
DBA5040SLV SLV Silver
DBA5040GLD GLD* Gold
DBA5040BLU BLU* Blue

Note: 5000 Series full assemblies and hat components will contain the hat colour
*Colour available in particular applications only.

Style Variations

DBA Part no. Base number Suffix Disc Style
DBA5040 DBA040 none Plain face
DBA5040S DBA040 S Slotted (T3 pattern)
DBA5040XD DBA040 XD Cross-drilled & dimpled
DBA5040W DBA040 W Wave design

*DBA part numbers may also be a flat disc ‘.1’, i.e. DBA5040.1S

5000 Series examples:

DBA Part no. Base number Suffix Description
DBA5040SLVS DBA4040 SLV, S Complete assembly, Silver hat, Slotted (T3)
DBA5040BLKXD DBA4040 BLX, XD Complete assembly, Black hat, Cross-drilled & dimpled
DBA5040SLVWS DBA4040 SLV, W , S Silver hat, Wave design & Slotted (T3)
DBA5040.1WS DBA4040 .1, W, S Flat disc (ring) only in Wave design and Slotted (T3 pattern)
DBA5040.2SLV DBA4040 .2, SLV Hat only in Silver colour