Performance Modifications

Flap / Aileron Gap Seal Kit. Piper Twin Comanche PA-30, PA-39 Models. 30GS

The KNOTS 2U gap seal kit is the most complete and effective on the market. They are made of 2024T-3 Alclad aluminum, and install to look like they were meant to be there from the factory........not an afterthought!. Our kit is the most complete...

Rudder Gap Seal Kit. Piper Comanche PA-24-400, PA-30, PA-39 Models. 30RS

The Rudder Gap Seal is very beneficial to the Single and Twin Comanches. Originally introduced for the Twin Comanche by Piper in 1971 to increase rudder authority and lower Vmc on twins, KNOTS 2U has improved the design and made it available for all...

Wing Root Fairing Kit. Piper Twin Comanche PA-30 & PA-39 Models. 30WR

The Comanche wing root fairing has long been one of our most popular mods. Originally conceived by Piper for the sleek Comanche 400. It will add 2 mph in cruise speed as well as 50 ft/min in climb. Low speed handling is also noticeably improved...

Wing Fillet Kit. Piper Twin Comanche PA-30, PA-39 Models. 30WF

The Wing Fillet was originally developed to help take the common "slam dunk" out of the Comanche landings. By smoothing the vortices coming from the flap-fuselage junction, the air over the stabilator is less disturbed giving it more authority at...

Wing Tips. Piper Comanche PA-24, PA-30, PA-39 Models. (Set of Two) 2430WT

Piper Comanche PA-24, PA-30 and PA-39 high performance wing tips by Knots 2U. FAA STC approved. The Arapaho Wing Tip is the most aerodynamic wing tip design on the market for the Comanche series adding 2-3 mph!  It is a Hoerner style (contoured)...

Gear Lobe Fairing Kit. Piper Twin Comanche PA-30, PA-39 Models. 30LOB

Gear Lobe Fairings have been a very successful modification for the the Piper Comanche. Extensive tuft testing showed that without the lobes some of the tufts behind the tire were actually pointing straight down! The Gear Lobes will add 3-4 mph in...

Hub Cap W/Access Door. 6" Wheel (Set of Two) LSM-200-701-1

Part Number: LSM-200-701-1      Approval Basis: Supplemental Type Certificate No(s) SA01224AT Replaces: n/a  Aircraft Eligibility: Bonanza 33, 35, 36 Series, Beech 19, 23, 24, 58 SeriesCessna C-150,...

Vertical Fin Cap Fairing. Piper Twin Comanche PA-30, PA-39 Models.

The fairing replaces the large 3 3/4" diameter opening with a 2 1/2" diameter base which will accept a small strobe. Part Number: 30BCN Approval Basis FAA-PMA Replaces:   Aircraft Eligibility: Piper PA-30, PA-39 ...

Fiberglas Vertical Fin Cap Fairing. Piper Twin Comanche PA-30 / PA-39 Models. 30FIN

For Aircraft that already meet the anti-collision lighting requirements without a strobe or rotating beacon on top of the vertical fin this part can be added to reduce drag Part Number: 30FIN     Approval Basis: ...

Challenger Air Filter, High Performance. (CPE-1040)

K&N Performance Filters have been well known in the automotive world for years, unsurpassed in airflow and filtering capability they are now one of the most used filters on the road today. Now this technology is available and FAA-PMA approved by...

Nacelle Exhaust Fairing Kit, Set of Two. Piper PA-30, PA-39.

The KNOTS 2U Nacelle Exhaust Fairing kit works on either normally aspirated or Turbo Twin Comanches. By improving the angle of the air exiting the cowling, cruise speed is increased by 2-3 mph . The fairings are made of Stainless Steel and add an...

PIPER PA30 & PA39 TWIN COMANCHE WOW COWL (SET OF TWO). LSM-100-009-1

Mod for the PA30 & PA39 The WOW COWL mod consists of two new low drag nose bowls that give you much-improved access and lower drag. The reduced drag of the cowl mod provides 7 MPH in cruise speed. The reduced drag also provides extra range...

Nacelle Induction System Kit. Twin Comanche PA-30 & PA-39 Models. 30IND

The KNOTS 2U NACA Induction System for the normally aspirated Twin Comanche is designed to increase manifold pressure while lowering cylinder head temperatures (particularly the #3 cylinder) A NACA duct mounted to the cowl door pumps cool air...

Arapaho Windshield Kit. Piper Twin Comanche PA-30, PA-39 Models. 30AWS

The ARAPAHO windshield was derived from the last Comanche built but never sold.......the Arapaho PA-40. It removes a section of the roof and replaces it with 1/4 inch glass making a cleaner profile and adding improved visibility over the original...

Windshield Cowler Kit. Piper Twin Comanche PA-30, PA-39 Models. 30WS

The KNOTS 2U windshield "Cowler" wraps around the bottom of the windshield blending it cleanly into the airframe. It covers the existing retainer and its exposed hardware for a slight speed increase and stunning aesthetics. It fits the stock Piper...

Arapaho Dorsal Fin. Piper Twin Comanche PA-30, PA-39 Models. 30DF

The Arapaho Dorsal Fin kit was derived from the last Comanche ever built, the Arapaho PA-40. It was installed by Piper for two reasons; to add more directional stability in cruise, and to lower Vmc. For cabin air, a newly designed more efficient NACA...

Radar Nose Kit. Piper Twin Comanche PA-30 / PA-39. 30RADAR

The Knots 2U Radar Nose Modification replaces your existing inefficient nose with a more modern and aerodynamic design. The new radome will accept up to a 10" radar antenna. This is accomplished by removing the existing air plenum and replacing it...

Speed Propellers, Set of Two. Piper Twin Comanche PA-30 / PA-39

Knots 2U is pleased to offer the latest in Hartzell propeller designs specifically STC'd for the Twin Comanche.  This new propeller uses a "D Twist" blade which unloads the tips and improves performance while costing considerably less than...

Speed Spinners, Set of Two. Piper Twin Comanche PA-30 / PA-39

Knots 2U offers a smooth sleek spinner for the Twin Comanche aircraft. It is STC'd for both standard and counter rotating models. The spinner is designed for superior aerodynamics by reducing the size of the openings around the prop. It also...

Vortex Generator Kit, Piper PA-30 / 39 Models

Micro Vortex Generators are small aluminum blades placed in a spanwise line aft of the leading edge of the wing and tail surfaces. They control airflow over the upper surface of the wing by creating vortices that energize the boundary layer. This...