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Description
POLARIS STD PISTON KIT 650Competitively priced forged pistons Coated with MOS2 for high performance and heat absorption Ported to match WSM Banshee sleeves Four piston categories from standard, big bore, 5mm long rod and big bore with 5mm long rod Piston pin is 5mm higher on long rod pistons to accommodate long rod Made in Germany FITMENT: Polaris 1995 SL 650 SL 650 Std 1994 SL 650 1993 SL 650 1992 SL 650 Part Number: 328300 Manufacturer: WSM PERFORMANCE PARTS Manufacturer
Competitively priced forged pistons
Coated with MOS2 for high performance and heat absorption
Ported to match WSM Banshee sleeves
Four piston categories from standard, big bore, 5mm long rod and big bore with 5mm long rod
Piston pin is 5mm higher on long rod pistons to accommodate long rod
Made in Germany
Coated with MOS2 for high performance and heat absorption
Ported to match WSM Banshee sleeves
Four piston categories from standard, big bore, 5mm long rod and big bore with 5mm long rod
Piston pin is 5mm higher on long rod pistons to accommodate long rod
Made in Germany
FITMENT:
Polaris
1995
SL 650
SL 650 Std
1994
SL 650
1993
SL 650
1992
SL 650
Manufacturer:WSM PERFORMANCE PARTS
Manufacturer Part No.:010-831K
U / M :EACH
Actual Weight:0.75lbs
Shipping Weight:0.75lbs
Package Dimensions:4.5” x 3.8” x 3.8”
Item Segment:
Marine
Category Details:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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
4.5 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Klipsch R50 M next generation
Size: 5.25” Woofer
In spite of small size sound is very nice iam using it with a subwoofer and with my yamaha A4A AV receiver i like it iam hearing mostly heavy metal and the speakers have a nice punch and attack
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Reviewed in the United States on February 18, 2026
★★★★★ 4
compact surrounds that blend well with the right setup
Size: 4” Woofer
I picked up the Klipsch R‑40M as part of a full 5.1 system built around the R‑50M fronts and the R‑50C center. My original plan was to use another pair of R‑50M speakers in the back, but they simply didn’t fit in the rear cabinet space I have. The R‑40M ended up being the only model that fit comfortably, so they became my surround channels.
In terms of build quality, they feel solid and consistent with the rest of the Reference Next‑Gen line. The copper woofers and updated horn design give them the same visual identity as the larger models, which helps the whole system look cohesive. They’re compact enough to place in tighter spaces without compromising too much on performance.
Sonically, the R‑40M does a respectable job as a surround speaker. Effects are clear, directional cues are easy to follow, and they integrate smoothly with the more powerful R‑50M fronts. That said, they are noticeably less powerful than the R‑50M, so you need to spend a little time balancing your levels. Once I bumped their channel trim a bit and adjusted the distance settings, the rear soundstage locked in nicely and felt much more even.
They won’t deliver the same fullness or dynamic punch as the larger models, but for rear channels that’s usually not a deal breaker. What matters is clarity and consistency, and the R‑40M handles both well. Movies with active surround mixes feel immersive, and ambient effects wrap around the room without calling attention to the speakers themselves.
If you’re building a system where space is limited in the back, the R‑40M is a practical and capable choice. Just be prepared to fine tune your calibration so they match the output of the bigger speakers up front. Once dialed in, they round out a 5.1 setup very effectively.
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Great Bang for the Buck!
Size: 5.25” Woofer
These R50 Studio Monitors are worth every penny. One could easily spend a heck of a lot more to get less. Have been a pro audio engineer my entire life. These monitors kick out clean, solid bass and accurate highs. Klipsch did a excellent job designing these monitors. Perfect for smail spaces where fidelity is critical. If you wall mount these, make sure you leave at least a 1.5 inch air gap between the back of the monitor and the wall. These units are sweet.
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Reviewed in the United States on July 22, 2025
★★★★★ 5
Worth the price
Size: 5.25” Woofer
I had in ceiling front speakers and went with these instead. The front ceilings are now height speakers. Sounds great now.
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Reviewed in the United States on January 23, 2026
★★★★★ 5
Small but mighty
Size: 5.25” Woofer
Great sound. I can turn my stereo up loader than I care to listen to it and notice no distortion.
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Reviewed in the United States on April 20, 2026