Description

StopTech Drilled Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers that look great behind your wheels – and offer significantly improved braking performance. The unique cross-drilling aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Built to last; the black e-coating provides protection from corrosion and the high carbon metallurgy (in most applications) offers quieter operation; better crack resistance and increased performance.

Product Overview

For drivers who need something even tougher than a standard StopTech Sport rotor, but are not ready for a big brake kit, StopTech offers cryogenically treated Cryo rotors. Cryogenic treatment is a one-time stress relief process that involves both cold and heat cycling of the brake rotor. Using a proprietary computer-controlled process over a 24-hour period, the cryo machine gradually cools the rotors down to -300 º F, then gradually brings them up to over +300º F, and finally back to room temperature. This conditioning of the rotor improves its service life, especially in fleet and emergency vehicle applications. Any new StopTech or Centric Premium 1-piece replacement rotor can by cryogenically treated prior to shipment. Cryo treatment typically adds 5-7 business days for processing.

Features and Benefits

• Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal. Especially effective with higher friction; European style brake pad compounds. Drilled for increased bite; improved looks and better performance
• Drilled/Slotted Helps Evacuate Gasses/Dust/Heat
• Directional Curve Vane Designs On Selected Apps
• Power Alloy Is Descendant Of Patented AeroRotor
• Black E-Coated Non-Friction - Corrosion Protection
• Increased Initial bite and Wet Weather Response
• Superior Resistance To Cracks From Thermal Stress
• Double Disk Ground For Consistent Friction Surface
• Direct OE Replacement

Product Details

ABS Tone Ring Included:	No
Attribute ID (Type):	California Proposition 65
Attribute ID Type:	California Proposition 65
Bearings Included:	No
California Proposition 65 Site (basic):	https://www.p65warnings.ca.gov/
California Proposition 65 Site [basic]:	https://www.p65warnings.ca.gov/
California Proposition 65 Text (basic):	WARNING: Cancer and Reproductive Harm
California Proposition 65 Text [basic]:	WARNING: Cancer and Reproductive Harm
California Proposition 65:	WARNING: Cancer and Reproductive Harm
Center Hole Diameter:	62.000
Description:	StopTech Sport Cross Drilled Brake Rotor; Rear Left
Disc Mounting (cntrc):	Floating / DIH
Disc Mounting [cntrc]:	Floating / DIH
Discard Thickness:	8.400
Hat Finish:	Coated
Misc Holes (cntrc):	1
Misc Holes [cntrc]:	1
Mounting Bolt Hole Circle Diameter:	100.000
Nominal Drum Diameter:	6.331
Nominal Thickness:	10.000
Outside Diameter:	10.157
Overall Height:	2.362
Part Number:	sto128.34019L
Position:	Rear Left
Rotor Type:	Drilled
Solid Or Vented Type Rotor:	Solid
Stud/Lug Hole Diameter:	0.591
Stud/Lug Hole Quantity:	4
Surface Type:	X Drilled
Title:	StopTech Sport Cross Drilled Brake Rotor; Rear Left
WARNING CA Proposition 65 Message:	WARNING: Cancer and Reproductive Harm
WARNING CA Proposition 65:	Yes
Weight (cntrc) kgs:	4.080
Weight (cntrc) lbs:	8.980
Weight [cntrc] kgs:	4.080
Weight [cntrc] lbs:	8.980

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	sto936.34037	Street Axle Pack, Drilled, 4 Wheel (1x sto128.34018L, 1x sto128.34018R, 1x sto128.34019L, 1x sto128.34019R, 1x sto308.04930, 1x sto308.02790)
	sto939.34527	Street Axle Pack Drilled, Rear (1x sto128.34019L, 1x sto128.34019R, 1x sto308.02790)

Data: v4.2 - Upd: 2026-10-11 13:53:47

Features

Specifications

Product Attributes - UPC

805890540731

Product Attributes - Brand

StopTech

Product Attributes - Quantity

Sold individually.

Product Attributes - Part Type

Brake Rotors

Product Attributes - Rotor Style

Cross-drilled surface

Product Attributes - Product Line

StopTech Drilled Brake Rotors

Product Attributes - Rotor Finish

Black E-Coat

Product Attributes - Rotor Material

Iron

Product Attributes - Rotor Construction

Vented

Product Attributes - Intended for Street Use

Yes

Product Attributes - Nominal Thickness (in.)

0.394 in.

Product Attributes - Manufacturer's Part Number

128.34019L

Product Attributes - For Use with Stock Calipers

Yes

Product Attributes - Rotor Outside Diameter (in.)

10.16 in.

Compatibility