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. 

Drop available in:

40mm

60mm

90mm

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

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. 

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