will this fit my 1978 jeep CJ7 304?

If you have a smooth open hole and it is the correct opening size. Check the grommet size. If the same go for it.

Will it fit a 1989 ford ranger v6 2.9?

This Is a universal fits Breather, it fits a lot of different engines. It fit my 1986 Dodge 360. You need to measure the hole in your valve cover with the rubber grommet removed, the hole should be about 1 1/4” across, if it is, it will fit. If it is not, it won’t. It is that simple. I hope this helps.

Would this breather be secure with a screw-in opening?

I don't think you can make this work. It is made for smooth open hole.

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Spectre Performance 4276 1-1/4" Push-In Breather with Grommet

Product ID: 298237671

Details

Material
Alloy Steel
Brand
Spectre
Item dimensions L x W x H
18 x 13 x 10
Exterior finish
Chrome
Inlet connection size
1.25

🔩Triple chrome plated steel durability

⚙️1-1/4" universal push-in fit

🛡️High-quality alloy steel build

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Description

⚡ Push your performance to the limit with Spectre’s sleek breather!

LIGHTWEIGHT COMPACT - At just 120g and minimal dimensions, it adds performance without bulk—perfect for the modern performance enthusiast.
RACE PROVEN DURABILITY - Triple chrome plating offers superior corrosion resistance and a sleek, lasting finish.
SEAMLESS UNIVERSAL FIT - Engineered to fit all push-in applications effortlessly, ensuring quick and secure installation.
INTEGRATED GROMMET SEAL - Includes a precision grommet for airtight sealing, preventing leaks and maintaining optimal engine performance.
PREMIUM ALLOY STEEL CONSTRUCTION - Crafted from high-quality materials for unmatched strength and longevity under extreme conditions.

The Spectre Performance 4276 Push-In Breather with Grommet is a precision-engineered, triple chrome plated alloy steel component designed for universal push-in applications. Lightweight and durable, it ensures airtight sealing and long-lasting performance, making it a must-have upgrade for serious automotive professionals and enthusiasts aiming for race-proven reliability.

Specifications

ASIN	B004AIZAH6
Brand	Spectre
Brand Name	Spectre
Customer Reviews	4.6 out of 5 stars 1,429 Reviews
Exterior Finish	Chrome
Exterior finish	Chrome
Global Trade Identification Number	00089601427607
Included Components	CAP; BREATHER, PUSH-IN, W/GROMMET
Inlet Connection Size	1.25 Millimeters
Inlet Connection Type	Push-In
Inlet connection size	1.25 Millimeters
Inlet connection type	Push-In
Item Dimensions	18 x 13 x 10 millimeters
Item Type Name	Automotive Parts & Accessories
Item dimensions L x W x H	18 x 13 x 10 millimeters
Manufacturer	Spectre
Manufacturer Part Number	4276
Material	Alloy Steel
Material Type	Alloy Steel
Model Number	4276
Number of Pieces	1
Number of Ports	2
Outlet Connection Size	1.25 Millimeters
Outlet Connection Type	NPT
Size	1 Count (Pack of 1)
UPC	089601427607
Unit Count	1 Count
Valve Type	Push Valve

Reviews

K**D

Best price

26.12.2025

M**A

Bien

6.03.2024

D**T

I am pleased.

11.08.2025

P**L

Make sure you get the right size.

22.11.2025

A**Z

Excelente producto

14.11.2020

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