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Upgrade your Porsche 911 with the K&N Engineering High-Flow Drop-In Air Filter, designed to enhance airflow and engine performance. Crafted with a layered, oiled cotton media, this filter efficiently captures contaminants while allowing increased airflow, resulting in improved horsepower and throttle response. Its reusable design means it can be cleaned and reused throughout the lifespan of your vehicle, providing long-term value and consistent engine protection. Backed by K&N's 10-Year/Million Mile Limited Warranty, this filter ensures reliability and performance for years to come.
Installation is straightforward, as the filter is engineered to fit directly into your factory air box without modifications. Whether you're restoring a vintage Porsche 911 or seeking to boost your vehicle's performance, this high-quality replacement filter offers a simple upgrade that delivers noticeable gains in engine efficiency. The durable construction and superior filtration properties help maintain engine health by preventing harmful debris from entering the intake system.
Designed to meet the needs of enthusiasts and daily drivers alike, the K&N 77-83 Porsche 911 CSI F/I Drop-In Air Filter combines ease of installation with effective filtration. Its compact dimensions are tailored to fit specific Porsche 911 models from 1974 to 1983, ensuring an optimal fit and seal. Trust in K&N's proven engineering to elevate your driving experience with improved airflow, horsepower, and engine longevity. This product is not only compatible with your vehicle but also offers a maintenance-friendly solution that supports a cleaner, more efficient engine over time.
Features:
Fitment:
1974 Porsche 911 Base
1974 Porsche 911 S
1975 Porsche 911 S
1976 Porsche 911 S
1976 Porsche 911 Turbo Carrera
1977 Porsche 911 S
1977 Porsche 911 Turbo Carrera
1978 Porsche 911 SC
1979 Porsche 911 SC
1980 Porsche 911 SC
1981 Porsche 911 SC
1982 Porsche 911 SC
1983 Porsche 911 SC
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
