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Description
K&N Universal Performance Clamp On Air Filter # RC-9720K&N Universal Performance Clamp On Air Filter # RC 9720 Air Filter Element, Filtercharger, Round Tapered, Cotton Gauze, Red, Citroen, GS LNA, Each Air Filter Style Conical Height (in) 3. 063 in. Inlet Flange Inside Diameter (in) 3. 188 in. Air Filter Top Measurement 3. 438 in. diameter Air Filter Bottom Measurement 5. 313 in. diameter Air Filter End Cap Material Steel Air Filter End Cap Finish Chrome Filter Material Cotton gauze Filter Color Red
K&N Universal Performance Clamp On Air Filter # RC-9720Air Filter Element, Filtercharger, Round Tapered, Cotton Gauze, Red, Citroen, GS/LNA, Each
Air Filter Style
Conical
Height (in)
3.063 in.
Inlet Flange Inside Diameter (in)
3.188 in.
Air Filter Top Measurement
3.438 in. diameter
Air Filter Bottom Measurement
5.313 in. diameter
Air Filter End Cap Material
Steel
Air Filter End Cap Finish
Chrome
Filter Material
Cotton gauze
Filter Color
Red
Quantity
Sold individually.
Notes
Fits 1973-1979 Citroen GS with 1.2L, 1976-1980 Citroen LNA with 0.6L, 1979-1980 Citroen GS with 1.3L, and 1977-1981 Citroen GS with 1.1L.
KN's universal performance air filters are designed and manufactured for a wide variety of applications, including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and more. Regardless of the angle or offset diameter of the air intake, there is probably a KN universal air filter for your equipment. All filters are constructed with ultra-strong, molded, pliable rubber flanges, which absorb vibration, allow for secure attachment, and can be stretched for up to 1/16 in. (1.5mm) to fit in-between sizes. KN universal air filters are washable and reusable.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.6 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 1
DO NOT PURCHASE APPLECARE+ THROUGH AMAZON (Please read before making a decision)
Style Name: MacBook Air 13" (M4), Configuration: 3 years
I rarely write reviews like this, but DO NOT PURCHASE APPLECARE+ THROUGH AMAZON.
Just over a month ago, I purchased an Apple MacBook Air (m4) with AppleCare+. The AppleCare+ wasn't populating on the laptop, so after calls with Apple Support and Apple Agreement Administration, they found that AMAZON sent them the approved agreement with the device serial number then abruptly canceled it the following day. This happened over a month ago, and I was not notified nor have I received a refund.
I would not have known it was canceled if not for Apple Support and Apple Agreement Administration.
The only recourse is to receive a refund from Amazon--which is NOT automatic, I am fighting for this--and purchase AppleCare+ directly through Apple. Had all this taken place after the 60-days purchasing the MacBook Air (I'm currently one week short of this deadline), then I would be SOL on being able to cover my device.
PURCHASE AT YOUR OWN DISCRETION/RISK AND CHECK THAT APPLECARE+ IS APPROVED AND ACTIVE ON YOUR DEVICE. Otherwise, play it safe and activate directly through Apple.
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Reviewed in the United States on December 28, 2025
★★★★★ 5
Worked fine for me 🙌🏽
Style Name: MacBook Air 13" (M4), Configuration: 3 years
I read a lot of comments that said there was an issue with their purchase of AppleCare+, I did not have any of those experiences. AppleCare+ was on the laptop (MacBook Air, 13-inch 2025) automatically. I received an email with my confirmation of AppleCare+ coverage, along with my agreement number, product serial number and expiration date. There was nothing I needed to do on my end, because as I said it had already been added to my computer and attached to my iCloud account. — I hate that there are so many bad experiences and hope everything works out for anyone experiencing a nightmare but I can only recommend based on my experience, 10/10.
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Reviewed in the United States on August 4, 2025
★★★★★ 5
No la necesito
Style Name: MacBook Neo 13" (A18 Pro), Configuration: Monthly
Garantía digital , no la necesito no compré la laptop
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
★★★★★ 5
Fantastic product
Size: 8 Fl Oz (Pack of 1)
Works Great, at first didn't believe all the reviews, I've bought 5 chainsaws from one season to the next. After each winter couldn't get them to start. Followed the instructions to flush and let sit for a few days. Every one started and ran great. Hands down, this is a remarkable product for cleaning out blocked fuel systems from sitting all winter would recommend it for all 2 cycle engines and use the stable blend for winter as well as anytime use to prevent fuel spoilage.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Efird, a great product
Size: 8 Fl Oz (Pack of 1)
Used this in a Troy Built Garden Tiller, the tiller would stall and hard to crank until we use the Sta Bil Fast Fix, tiller now runs great and does not stall.
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Reviewed in the United States on April 25, 2026