Apex Seals

We recommend .0015" of clearance between the apex seal and the rotor slot for all applications, boosted or naturally aspirated.

3 mm 12A or 13B Goopy Apex Seals are .115" thick, and you should be able to slide a .0015" feeler gauge into the rotor apex slot with a new apex seal.

Our oversized 12A 3 mm seals measure .118" (+ / - .001"). If your rotor slot measures .018" - .020", you may benefit from our oversized 2 mm seals which will allow you to re-gain the .0015" suggested clearance.

Our 2 mm apex seals are .075" thick and you should be able to slide a .0015" feeler gauge into the rotor apex slot with a new apex seal in place.

Goopy Performance 13B 2 mm oversized apex seals measure .078" (+/- .001"). If your rotor slot measures .077 - .078", then you may benefit from our oversized 2 mm seals which will allow you to re-gain the .0015 suggested clearance.

If your gap with the seal in place measures .002-.005" it is still usable, but keep in mind that tighter clearances means greater sealing characteristics.

Take note that 12A and 13B 3 mm apex seal slots suffer the most when it comes to rotor slots over-tolerance. We have measured many used rotor slots and have found very few that still had the stock widths.


Engine

Size

Thickness

Price per Set

   

Inches

millimeters

 

12A

3mm   Stock

.115"

2.921 mm

$350.00 MSRP

3mm   Oversized

.118" (+ / - .001")

2.997 mm (+ / - .025 mm)

$350.00 MSRP

13B

2mm   Stock

.075"

1.905 mm

$350.00 MSRP

2mm   Oversized

.078" (+ / - .001")

1.981 mm (+ / - .025 mm)

$350.00 MSRP

3mm   Stock

.115"

2.921 mm

$350.00 MSRP

3mm   Oversized

.118" (+ / - .001")

2.997 mm (+ / - .025 mm)

$350.00 MSRP

 


Goopy Performance Rotor Repair and cleaning kit

Price

1 - Precision hand file in either 2MM or 3MM.

Great for cleaning the Apex Seal slot to recommended specs
Quickly removes carbon buildup, bent edges and burs

2 - .0015 Feeler gauges
To be used for checking clearance between Apex Seals and Rotor Slot

2 - Stainless steel bristle brushes for corner seal (1/8)
Excellent for cleaning the rotors corner seal slot

$75.00 MSRP