Pike Musky Sink 4

The Specialty Series Pike Musky Sink 4 is our most versatile sinking esox line. The Type 4 (4-5IPS) covers multiple water columns. Our X-Strong Core provides extra core strength and exceptional handling in the coldest months.  

- Type 4 Sinking Head
-Intermediate Running Line
- Aggressive Taper Design
- X-Strong Core

WATER: Freshwater
LINE: Type 4 Sinking / Intermediate 
TAPER: Weight Forward
LENGTH: 100ft
CORE: Braided Nylon Multifilament
SPECIES: Pike / Musky / Bass 

Size WF8S/I

United States deliveries usually take 3-8 business days.

International deliveries can take up to 7 - 18 days.

If you have any question about shipping Contact Us our customer service department is here to help.

 P65 - WARNING: Cancer and Reproductive Harm

Pike Musky Sink 4 Breakdown

Our Specialty Series Pike Musky Sink 4 features a 30 ft. type 4 sinking head with a short 3 ft. front taper for turning over large, air-resistant flies. The short 3 ft. back taper helps load this line quickly and makes it extremely shootable. Intermediate running line removes any hinges in the line and gives you a smooth transition into the depths.

This dual colored line features our low stretch braided nylon core for consistent, powerful hook sets and ultimate stopping power. Our signature Shooting Technology keeps your line remaining slick, supple and fast shooting. The gray and brown color combination distinguishes taper change and is traceable yet stealthy in Esox environments.

SPECIES: Pike / Musky / Bass 

Freshwater Type 4 Sinking / Intermediate Weight Forward Braided Nylon Multifilament

WF 8 280 gr. 30 ft. 100 ft.
WF 9 330 gr. 30 ft. 100 ft.
WF 10 380 gr. 30 ft. 100 ft.
WF 11 450 gr. 30 ft. 100 ft.
WF 12 500 gr. 30 ft. 100 ft.
WF 12+ 600 gr. 30 ft. 100 ft.


Dual Welded Loops Technology Icon

Welded loops make rigging fast, easy and reliable. Cortland loops are strong, secure and durable.

Shooting Technology Icon

ST coating delivers a reduced-friction performance with a glass-smooth finish and remains a key element in line slickness over its life span.

Strong Core Technology Icon

Constructed with a tight weave and high pick count for extreme durability and maximum applied pressure.

Cold Temperature Technology Icon

Ideal use in 30-50 degree (F) temperatures.

Warm Temperature Technology Icon

Ideal use in 50 - 70 degree (F) temperatures.


Our Pike Musky fly lines are built to perform in both cold and warm water environments. This line will perform best in temperatures between 30 and 70 degrees (F).

The taper design for our Pike Musky Lines were built overly aggressive to cast large flies and punch through wind. The short body and short rear taper allows for minimal false casts while achieving maximum distance. The short front taper will turn over any large fly or weighted pattern with ease. This line is built overweighted for quick loading and fast shooting.

The brown and gray color combination distinguishes taper change and proper loading point. These colors are stealthy yet traceable in freshwater environments.

Cleaning your fly line is very important especially when fishing saltwater. Simply pull line off your reel into a clean bucket or tub of freshwater. Put roughly 1oz or more of Cortland’s Line Cleaner solution onto a clean rag or towel. Firmly squeeze the towel with Pro Line Cleaner around the line and slowly pull line through the towel. You should be able to see dirt or discolored streaks on the towel when finished.

Learn more about Cortland's Fly Line Cleaner Lubricant & Pads.

Hover: Neutral
Slow Intermediate: 1 IPS (Inches Per Second) 
Medium Intermediate: 1.5 - 2 IPS (Inches Per Second)
Fast Intermediate: 2 - 3 IPS (Inches Per Second)
Type 3 Sink Rate: 3 - 4 IPS (Inches Per Second)
Type 4 Sink Rate: 4 - 5 IPS (Inches Per Second)
Type 5 Sink Rate: 5 - 6 IPS (Inches Per Second)
Type 6 Sink Rate: 6 - 7 IPS (Inches Per Second)
Type 7 Sink Rate: 7 - 8 IPS (Inches Per Second)
Type 9 Sink Rate: 9+ IPS (Inches Per Second)

average rating 5.0 out of 5
Based on 2 reviews
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100% of reviewers would recommend this product to a friend
2 Reviews
Reviewed by Kory B.
I recommend this product
Rated 5 out of 5
Review posted

Predator Perfection

This line has a whole lot of power, had to keep reminding myself the large Muskie Buford style flies I was hucking were being thrown on a 380 grain line, felt like I was throwing something with even more power and weight behind it. Thus far, it works well in upper 30 and lower 40 degree water temps with air temps in the 40's and 50's but the line certainly seems to have ample rigidity for warmer weather too. The head length is perfect, just long enough you can still roll cast off snags in a river environment and make longer casts without having to shoot a ton of running line, but adequate power to huck large flies. Cortland did a great job with this line, looking forward to trying other lines in this series....

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Reviewed by Jordan M.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Great Line for Predators!

Really great line, loads very well for the line weight on the same weight rod. Feels similar to other competitive brands, but I know the core is stronger with Cortland so I'm switching everything over. We rose 9 muskies on the first float with this new line, so its gotta be good!

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