SKU: 51818577235

B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit

Sale price$175.14 Regular price$194.60
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Description

B58 BMW/Supra BMS Oil Catch Can Oil Filler Cap Dual Vent Connection KitUpgrade Your B58 Catch Can System with a True Dual Vent Solution For use with BMS Oil Catch Can for G Chassis Gen 2 B58 BMW M240 M340 M440 BMS Oil Catch Can for 2020+ B58 Toyota Supra GR MK5 BMS Oil Catch Can for G Chassis Gen 3 2025+ B58 BMW M340 M440 Take your B58 BMW or Supras crankcase ventilation performance to the next level with the BMS Oil Filler Cap Dual Vent Connection Kit = the missing link for ultimate catch can and engine efficiency. This


Upgrade Your B58 Catch Can System with a True Dual-Vent Solution

For use with 

BMS Oil Catch Can for G Chassis Gen 2 B58 BMW M240 M340 M440

BMS Oil Catch Can for 2020+ B58 Toyota Supra GR MK5

BMS Oil Catch Can for G Chassis Gen 3 2025+ B58 BMW M340 M440


Take your B58 BMW or Supra’s crankcase ventilation performance to the next level with the BMS Oil Filler Cap Dual Vent Connection Kit = the missing link for ultimate catch can and engine efficiency. 

This precision-machined billet cap replaces the factory oil filler cap and creates a second dedicated exit point for dirty PCV gases. That means both the crankcase vent and the valve cover breather can now be routed into your oil catch can. Twice the inputs into your catch can means twice the oil vapor capture, keeping harmful oil mist out of your intake tract. Cleaner air, cleaner intake valves, and a more efficient PCV system, more efficient engine, it’s a simple upgrade with major payoffs. 

Why This Matters:

  • Double the Captured Flow: Adds a second breather port for PCV/vapor extraction so you pull more blow-by gasses into your catch can.

  • Reduces Piston Resistance: This creates a slight negative pressure (vacuum) in the crankcase, reducing the resistance the pistons face as they move, improving fuel economy and performance.

  • Manages Pressure: "Blow-by" gases (unburned fuel, air, combustion byproducts) get past piston rings into the crankcase, creating pressure.

  • Cleaner Combustion Air: Reduces oil vapor recirculation that leads to intake valve carbon buildup. 

  • Maximized Catch Can Efficiency: Works with the BMS catch can to let it do more of its job. 

  • Perfect For: Anyone running a B58 BMS oil catch can looking to squeeze every bit of performance and protection from their PCV system, especially on tuned or high-boost builds.

  • Precision-Built Fit: CNC billet aluminum construction replaces the factory filler cap for a secure, purposeful connection. 

  • All Hardware Included: Includes billet cap, AN fittings, high-temp hose, T-fitting, and clamps for a clean install. 

What's Included:
(1) BMS B58 BMW Billet Oil Filler Breather Cap 
(1)
-12ORB 90º to -12AN fitting
(1)-12 AN barbed straight Fitting
(1) Heavy-duty custom silicone hose
(1) Barbed PCV T- fitting
(3) Hose clamps

⚠️ ATTENTION: This installs differently than the OEM oil filler cap. To install, line the grooves up with the tabs on the filler neck on the car, push all the way down and twist down tightly. Be sure they cap is seated and tightly sealed before use to prevent leaks. 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51818577235

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4.8 ★★★★★
Based on 13 reviews
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Elizabeth
Massapequa, US
★★★★★ 3
Maybe not for super aggressive chewers
Color: A Violet, Size: For Larege Dogs, Color: A Violet, Size: For Larege Dogs
I had high hopes for this toy, I was so excited about it. I have aggressive chewers, two Malinois/Dutch Shepard mixes and a Pit. The Shepard's chewed pieces off of it in literally 5 minutes. At the ends there is a small lip and that's where they started chewing pieces off. I had ordered a second one before I gave them this one (early Christmas present) because when I received it I noticed it felt very sturdy and durable. They do like it so since they already chewed this one I'm going to see if I can shave that lip off and maybe they won't get anymore pieces off. That'll decide if I return the one that arrives tomorrow. Maybe not good for super aggressive chewers. It's very thick and seems well made. Might just be better for other dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
B
Verified Purchase
Bethalyn
Alexandria, US
★★★★★ 5
Fantastic for rough chewing
Color: Bule 0, Size: For Larege Dogs
Our big boy is rough with his toys and always seems to disintegrate his toys in seconds. I had seen this with hoping this will be the toy he doesn’t destroy. On day 2 now with the toy and he’s obsessed, even feel asleep with the toy in his mouth and still in one piece. Highly recommended for tough chewers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
N
Verified Purchase
Nani
Whiting, US
★★★★★ 3
Good but not for my dog
Color: A Red, Size: For Larege Dogs
Dog loves it but already falling apart. Can't seem to find a truly safe dog toy that won't come apart with my aggressive chewer. Had to toss it before pieces got ingested. But great toy in the begining. Just not safe for pit/staff type dog that destroy and chew.
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Reviewed in the United States on May 25, 2026
M
Verified Purchase
Mayberry mommy
Port Orchard, US
★★★★★ 5
Put your aggressive Chewer dog to the test!
Color: A Red, Size: For Larege Dogs
A very tough toy to stand up to my aggressive chewer lab! It's a great value! The squeak is not annoying, and she's got to clamp down hard on it. It's a nice throw toy! It bounces once or twice but it still brings out the pup in our Dog! Not too small a nice size for a Lab or retriever
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Reviewed in the United States on June 7, 2026
M
Verified Purchase
Mo
Massapequa, US
★★★★★ 5
A Hardy Toy for Chewers
Color: Bule Octopus, Size: For Larege Dogs, Color: Bule Octopus, Size: For Larege Dogs
I must say I was very surprised with the durability of this toy. We've had it for 3 days and not one puncture hole. My rescue is a destroy chewer that doesn't care for Hardy chew toys unless it squeaks. While the squeaker isn't the best, he still loves it. We put peanut butter in the grooves for him and he goes to town. Will purchase again should he ever destroys it, worth the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026

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