High quality stainless steel headers available in three different drops to fit most applications. To determine the drop you need, measure from the face of the of the exhaust port down to the center centerline of the inlet on your canister or tuned pipe. 

70cc standard headers require 22mm couplers and clamps

70cc 2 into 1 headers require 28mm coupler and clamps

100 and 120cc headers require 25mm couplers and clamps

150 and 170cc engines require 28mm or stepped couplers and clamps

Please note: 2 into 1 headers are only available for the DA70.

Below is a list of some popular planes and what headers and header drop distances fit them best: 

AJ Aircraft - Laser with DA70 use 90mm drop 2 into 1 header with MTW TD110H canister

Extreme Flight -  91" Extra with DA70 use 60mm drop 2 into 1 header with MTW TD110H canister.

Carden - 124" Pro Extra 300  DA200 deep drop or 90mm drop for twin cylinder engines

Dalton Aviation - 42% Extra 260 90mm drop, if using front exit KS cans use 70mm drop

Flex Innovations - Mamba  DA70,  2 into 1  40mm drop header, MTW TD110H

*Headers priced as pairs, with the exception of the DA70 2 into 1 headers.