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4 - Pot Forged Midilite Caliper Radial Mount

The new Midilite four piston radial mount is the first of a new generation of Wilwood aluminium calipers produced from a drop-forged billet. This forging process produces a body design that provides higher strength and reduced load deflection superior to any cast or machined block billet caliper, combined with substantial x-bolting and extended flank design it is one of the stiffest, radial mount calipers currently available.

Most multi-piston calipers suffer from low speed caliper squeal caused by pad torsional vibration - The Midilite caliper features the unique Wilwood SRS (Squeal Reduction System) incorporating stainless steel pad retainers. These retainers eliminate the bridge wear caused by pad gouging and reduce the pad rattle/vibration harmonics which are the primary cause of the annoying '4-pot squeal'.

The clever quick change pad clip (patent under consideration), reusable by design allows ultra fast pad changes without hassle. The Midilite accepts disc diameters from 240 to 310mm, the low profile design allows maximum disc accommodation within a given wheel diameter, available to suit 21mm and 25mm disc width and piston sizes 1.75", 1.5", 1.38" and 1.25" allow a match with most stock/race master cylinders.

The caliper incorporates thick wall hard anodised pistons, is fully dust sealed and is supported by a range of Polymatrix pad compounds for street, rally and race applications.

NOTE: This caliper is also known as Wilwood Dynapro, Dynapro 4 pot & Dynapro Dust Seal Radial.

Part Numbers For Ordering:
Bore SizeDisc WidthCaliper Finish
Part Number
1.75" 44.5mm1.00" 25.4mmBlack120-7545
1.75" 44.5mm1.00" 25.4mmGrey 120-14709
1.75" 44.5mm.83" 21.1mmBlack120-7544
1.75" 44.5mm.83" 21.1mmGrey 120-14708
1.62" 41.1mm
 1.00" 25.4mm
Grey 120-14707
1.62" 41.1mm
.83" 21.1mm
Grey 120-14706
1.50" 38.1mm1.00" 25.4mmBlack120-7472
1.50" 38.1mm1.00" 25.4mmGrey 120-14705
1.50" 38.1mm.83" 21.1mmBlack120-7471
1.50" 38.1mm.83" 21.1mmGrey 120-14704
1.50" 38.1mm.38"/.50" / 9.6/12.7mmBlack 120-7749
1.50" 38.1mm.38"/.50" / 9.6/12.7mmGrey 120-14703
1.38" 35.1mm1.00" 25.4mmBlack120-7474
1.38" 35.1mm1.00" 25.4mmGrey 120-14702
1.38" 35.1mm.83" 21.1mmBlack120-7473
1.38" 35.1mm.83" 21.1mmGrey 120-14701
1.38" 35.1mm.38"/.50" / 9.6/12.7mmBlack 120-7751
1.25" 31.8mm1.00" 25.4mmBlack120-7543
1.25" 31.8mm1.00" 25.4mmGrey 120-14700
1.25" 31.8mm.83" 21.1mmBlack120-7542
1.25" 31.8mm.83" 21.1mmGrey120-14699


Note: Please select caliper part number and caliper finish from the drop down below.

Type III Mil-Spec hard anodizing replaces Type II black anodizing as the standard finish on all base and powder coat finish caliper models. This process produces a thicker, harder surface with a rich, medium-gray appearance.  More importantly, it creates a more durable wear surface in the piston bores, with increased resistance to abrasion and corrosion over the entire external surface of the caliper.

Available Options:
Brake Caliper Part Number:  

Your IP Address indicates that you are in the United States or Canada and we are currently unable to sell into those countries. If you do not reside in the United States or Canada then please e-mail your request directly to sales@rallydesign.co.uk quoting Ref: CATINFO/SG2/

4 - Pot Forged Midilite Caliper Radial Mount
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4 - Pot Forged Midilite Caliper Radial Mount
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PLEASE NOTE: All prices exclude VAT at 20%.
Where applicable, this is calculated and added during the checkout procedure.
This product was added to our catalogue on Friday 17 September, 2004.
Current Reviews:

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