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SLP (Starting Line Products)

High-performance exhaust, clutching, skis, and handling upgrades engineered for riders who want more power, more control, and more confidence in the mountains.

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SLP Outlaw Twin Pipes Stage 2 - Polaris 850 Matryx RMK/Khaos/Slash

SLP Outlaw Twin Pipes Stage 2 - Polaris 850 Matryx RMK/Khaos/Slash

SLP
$ 3,749.99 - $ 3,749.99
$ 3,749.99
$ 3,749.99
$ 3,749.99 - $ 3,749.99
$ 3,749.99

SLP Outlaw Twin Pipes Stage 2 - Polaris 850 Matryx RMK/Khaos/Slash delivers top-level power gains for Polaris snowmobiles. Built for performance an...

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SLP Outlaw Twin Pipes Stage 1 - Polaris 9R

SLP Outlaw Twin Pipes Stage 1 - Polaris 9R

SLP
$ 4,041.49 - $ 4,041.49
$ 4,041.49
$ 4,041.49
$ 4,041.49 - $ 4,041.49
$ 4,041.49

SLP Outlaw Twin Pipes Stage 1 - Polaris 9R delivers top-level power gains for Polaris snowmobiles. Built for performance and durability.

SLP Outlaw Twin Pipes Stage 1 - Polaris 850 Matryx RMK/Khaos/Slash

SLP Outlaw Twin Pipes Stage 1 - Polaris 850 Matryx RMK/Khaos/Slash

SLP
$ 3,222.72 - $ 3,222.72
$ 3,222.72
$ 3,222.72
$ 3,222.72 - $ 3,222.72
$ 3,222.72

SLP Outlaw Twin Pipes Stage 1 - Polaris 850 Matryx RMK/Khaos/Slash delivers top-level power gains for Polaris snowmobiles. Built for performance an...

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SLP SLP Stage 1.5: for Polaris 650 Matryx RMK - Stage Kits for Snowmobiles

SLP Stage 1.5: for Polaris 650 Matryx RMK

SLP
$ 1,552.80 - $ 1,552.80
$ 1,552.80
$ 1,552.80 - $ 1,552.80
$ 1,552.80

Experience significant performance improvements with this Stage 1.5 kit, tailored for the Polaris 650 Matryx RMK. It offers a balance between power...

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SLP SLP Stage 1: for Polaris 600 Axys - Stage Kits for Snowmobiles

SLP Stage 1: for Polaris 600 Axys

SLP
$ 877.05 - $ 877.05
$ 877.05
$ 877.05 - $ 877.05
$ 877.05

A comprehensive performance package designed to enhance the power and responsiveness of the Polaris 600 Axys. It includes components that work harm...

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SLP SLP Stage 5 - Hillclimb Edition Kit: for 2013-15 RMK - Stage Kits for Snowmobiles

SLP Stage 5 - Hillclimb Edition Kit: for 2013-15 RMK

SLP
$ 3,677.33 - $ 3,677.33
$ 3,677.33
$ 3,677.33 - $ 3,677.33
$ 3,677.33

Slam the door on the competition with this Stage 5 kit for the Polaris 800 Pro.Refined for hillclimb racers by adding a Bully Dog GT with custom SL...

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SLP SLP Tunnel Supports for 2012-24 Arctic Cat M Sleds 153/162 - Bumpers for Snowmobiles

SLP Tunnel Supports for 2012-24 Arctic Cat M Sleds 153/162

SLP
$ 276.50 - $ 276.50
$ 276.50
$ 276.50 - $ 276.50
$ 276.50

Add support to your tunnel with these easy-to-install supports..

SLP Outlaw Twin Pipes - Polaris 9R

SLP
$ 2,922.78 - $ 2,922.78
$ 2,922.78
$ 2,922.78
$ 2,922.78 - $ 2,922.78
$ 2,922.78

SLP Outlaw Twin Pipes - Polaris 9R delivers top-level power gains for Polaris snowmobiles. Built for performance and durability.

SLP Outlaw Twin Pipes - Polaris 850 RMK & SKS 155

SLP Outlaw Twin Pipes - Polaris 850 RMK & SKS 155

SLP
$ 2,612.74 - $ 2,612.74
$ 2,612.74
$ 2,612.74
$ 2,612.74 - $ 2,612.74
$ 2,612.74

SLP Outlaw Twin Pipes - Polaris 850 RMK & SKS 155 delivers top-level power gains for Polaris snowmobiles. Built for performance and durability.

SLP SLP Spring Compressor for 2016-24 Arctic Cat and 2021-24 Yamaha Mountain Max with BOSS Driven Clutch - Clutching for Snowmobiles

SLP Spring Compressor for 2016-24 Arctic Cat and 2021-24 Yamaha Mountain Max with BOSS Driven Clutch

SLP
$ 168.43 - $ 168.43
$ 168.43
$ 168.43 - $ 168.43
$ 168.43

Easily compress and change your clutch spring without removal..

SLP SLP Lightweight Silencer 2016-22 600 Polaris Axys - Exhaust for Snowmobiles

SLP Lightweight Silencer 2016-22 600 Polaris Axys

SLP
$ 492.43 - $ 492.43
$ 492.43
$ 492.43 - $ 492.43
$ 492.43

Replace your stock silencer with this lightweight version for improved performance and weight reduction..

SLP SLP XLT/XCR 580/600 Head O-Rings - Other for Snowmobiles

SLP XLT/XCR 580/600 Head O-Rings

SLP
$ 36.86 - $ 36.86
$ 36.86
$ 36.86 - $ 36.86
$ 36.86

High-quality head O-rings that ensure optimal sealing for the XLT/XCR 580/600 engines. They are manufactured to meet or exceed OEM specifications, ...

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SLP SLP Replacement Roller for Arctic Cat BOSS Secondary - Accessories for Snowmobiles

SLP Replacement Roller for Arctic Cat BOSS Secondary

SLP
$ 46.93 - $ 46.93
$ 46.93
$ 46.93 - $ 46.93
$ 46.93

High-performance replacement roller designed to enhance the efficiency of the Arctic Cat BOSS Secondary Clutch. It offers increased rolling resista...

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SLP SLP Tunnel Supports for 2021-24 Yamaha Mountain Max - Bumpers for Snowmobiles

SLP Tunnel Supports for 2021-24 Yamaha Mountain Max

SLP
$ 276.50 - $ 276.50
$ 276.50
$ 276.50 - $ 276.50
$ 276.50

Designed for the 2021-2024 Yamaha Mountain Max, these tunnel supports enhance the structural strength of the tunnel. They are straightforward to in...

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SLP SLP Master Clutch Service Kit for Polaris Snowmobile - Clutching for Snowmobiles

SLP Master Clutch Service Kit for Polaris Snowmobile

SLP
$ 967.03 - $ 967.03
$ 967.03
$ 967.03 - $ 967.03
$ 967.03

Complete tool kit for Polaris drive and driven clutch service.Includes puller, holding tool, clutch press, and more..

SLP SLP Replacement Rollers for Arctic Cat BOSS Secondary - Accessories for Snowmobiles

SLP Replacement Rollers for Arctic Cat BOSS Secondary

SLP
$ 46.93 - $ 46.93
$ 46.93
$ 46.93 - $ 46.93
$ 46.93

High-performance rollers designed to enhance the efficiency of the Arctic Cat BOSS Secondary Clutch. They offer increased rolling resistance and du...

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SLP SLP Powder Valve Intake Kit for 2022 Polaris 850 Matryx Models (Including Boost) - Intakes and Ventilation for Snowmobiles

SLP Powder Valve Intake Kit for 2022 Polaris 850 Matryx Models (Including Boost)

SLP
$ 222.43 - $ 222.43
$ 222.43
$ 222.43 - $ 222.43
$ 222.43

This valve kit improves throttle response by delivering necessary airflow when the intake begins to plug.| Shop West Coast Sledders, Proudly Canadian.

SLP SLP Ice Scratcher Brackets for 2015-24 Ski-Doo Summit and 2022-24 Lynx Boondocker and Shredder - Skis for Snowmobiles

SLP Ice Scratcher Brackets for 2015-24 Ski-Doo Summit and 2022-24 Lynx Boondocker and Shredder

SLP
$ 34.99 - $ 34.99
$ 34.99
$ 34.99 - $ 34.99
$ 34.99

These brackets provide a durable storage solution for your ice scratchers.| Shop West Coast Sledders, Proudly Canadian.

SLP SLP Ultra Black Hi-Temp Silicone Sealer - Exhaust for Snowmobiles

SLP Ultra Black Hi-Temp Silicone Sealer

SLP
$ 34.78 - $ 34.78
$ 34.78
$ 34.78 - $ 34.78
$ 34.78

This universal sealant protects exhaust system joints and outlets from high temperatures.FAILURE to seal properly may lead to performance issues..

SLP SLP Hot Air Elimination Kit for Ski-Doo XP - Right Side Vents - Suspension for Snowmobiles

SLP Hot Air Elimination Kit for Ski-Doo XP - Right Side Vents

SLP
$ 181.93 - $ 181.93
$ 181.93
$ 181.93 - $ 181.93
$ 181.93

Hot Air Elimination Kit includes one shock tower inlet vent, one upper side panel vent, and one outlet vent..

SLP SLP Pivot Riser Blocks - Skis for Snowmobiles

SLP Pivot Riser Blocks

SLP
$ 67.25 - $ 67.25
$ 67.25
$ 67.25 - $ 67.25
$ 67.25

These riser blocks fit Polaris IQ and RMK models with T-Top columns and 3-inch wide stock riser blocks..

SLP SLP High Flow Intake Kit for 2012-17 Arctic Cat 800 Twin - Intakes and Ventilation for Snowmobiles

SLP High Flow Intake Kit for 2012-17 Arctic Cat 800 Twin

SLP
$ 235.93 - $ 235.93
$ 235.93
$ 235.93 - $ 235.93
$ 235.93

Eliminate intake restriction with this high flow kit that reduces vacuum by 50% and relocates the air temperature sensor for improved throttle resp...

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SLP SLP Spring Compression Tool - Clutching for Snowmobiles

SLP Spring Compression Tool

SLP
$ 195.43 - $ 195.43
$ 195.43
$ 195.43 - $ 195.43
$ 195.43

Change the driven clutch spring easily and safely with this tool designed for both Arctic Cat and Ski-Doo applications.Ideal for bench or vise use..

SLP SLP Universal Heavy Duty Flywheel Puller - Tools for Snowmobiles

SLP Universal Heavy Duty Flywheel Puller

SLP
$ 67.25 - $ 67.25
$ 67.25
$ 67.25 - $ 67.25
$ 67.25

Pull tough flywheels with this SLP built puller featuring specially shaped slots and high-quality bolts..

SLP – Built for Riders Who Want More Power, More Control & More Mountain

Starting Line Products (SLP) has been pushing snowmobile performance forward since 1973. Born in Idaho Falls and tested in some of the harshest mountain terrain in North America, SLP builds real performance parts for riders who refuse to settle for stock. If you want harder pull, cleaner throttle response, quicker backshift and more precise handling in the steep-and-deep — SLP is the upgrade.

At West Coast Sledders, we carry a full lineup of SLP performance products designed to make your sled hit harder, climb higher and stay consistent in technical terrain. From power-building exhaust systems to razor-sharp skis and clutching that reacts instantly when you crack the throttle — SLP gives you the edge when the mountain gets real.

Why Hardcore Riders Choose SLP

  • Max Power Gains – Exhausts engineered for real horsepower, not just sound.
  • Dialed Clutching – Instant engagement, smoother revs, and spot-on RPM control at altitude.
  • Laser-Precise Skis – Better lift in deep snow, stronger hold on off-camber climbs, and no more unpredictable darting.
  • Stability in the Gnarly Stuff – Suspension and handling upgrades that keep your sled planted when it matters.
  • Race-Proven Reliability – Tested by real mountain athletes, racers, and backcountry chargers who ride hard every day.

SLP Performance Categories

  • SLP Exhaust Systems – Lighter, louder (in all the right ways), and built for massive mid-range power.
  • SLP Clutch Kits & Components – Springs, helixes, weights and full kits tuned for deep-snow acceleration.
  • SLP Snowmobile Skis – More control, more stability, more confidence in steep, technical terrain.
  • SLP Suspension & Handling – Upgrades that keep your sled predictable when you’re sidehilling through chaos.
  • SLP Intake & Venting – Cooler temps, cleaner airflow, and stronger consistency at altitude.

If you’re riding big mountains, tight trees, cliff bands or deep pow zones — stock isn’t enough. SLP unlocks your sled’s full potential so you can ride harder, deeper and faster with total confidence.

Optimized for BC, Alberta & Big-Mountain Riding

West Coast Sledders carries SLP upgrades for Polaris, Ski-Doo, Lynx, Arctic Cat and Yamaha. Whether you ride Revy, Whistler, Sicamous, Valemount, McBride or the local zone — we’ll help you build a sled that hits exactly the way you want it to.

SLP Performance FAQ

How much performance will an SLP exhaust add?

Most SLP exhaust systems deliver noticeable horsepower gains and major weight savings. You’ll feel stronger pull in the mid-range, cleaner throttle response, and more consistent performance at elevation.

Is SLP clutching worth it for mountain riding?

100%. SLP clutching gives you instant bite when you stab the throttle, smoother backshift on climbs, better belt life and more predictable RPM control in deep snow. It’s one of the best upgrades you can make.

What makes SLP skis better for aggressive riding?

SLP skis offer insane stability and precise steering. Whether you’re threading trees or dropping into steep lines, they reduce unpredictable darting and give you stronger edge hold and flotation.

Do I need suspension upgrades with SLP performance parts?

If you ride fast, heavy or technical terrain, yes. SLP suspension components tighten your sled’s handling, reduce body roll, and help maintain traction in nasty conditions. It’s a game changer for technical riders.

Are SLP parts easy to install?

Exhaust and intake kits are straightforward. Clutching may require tuning knowledge, but anyone mechanically inclined can install SLP parts. If you need help, West Coast Sledders can point you toward trusted installers.

Do you ship SLP products across Canada and the U.S.?

Yes. We ship SLP performance parts across Canada—BC, Alberta, Saskatchewan—and to select U.S. regions. Shipping options vary by location and product size.