Jon_East

i found this guy that had a heddman header for a 22r for sale for 100 bucks. so i bought it from him. when i got it, the instuctions say that it is for a 20r. will it work or not??

jimbo74

welcome to the site... they should fit.... i know that lc engineering has headers, and they sell one thats a fit for the 20r/22r

metalhed

should I think the 20r has pear shaped exhaust ports and the 22r has round. The shape is not a show stopper, the ports are similar in size.

Jon_East

thanks, and metalhed, the ports on my header r round. couldnt tell u what they r on the block cuz i havent removed my exhaust manifold yet.

kyle_22r

20R and early(81-84) 22R exhaust ports are round. late(85-95) 22R exhaust ports are pear-shaped

20R intake ports are round, 22R intake ports are square

Yamaha+Toyota=Fun

Kinda off topic, but why pearshaped? Better flow?

jimbo74

so basically, he has the right header for his vehicle

kyle_22r

don't think it's really a major thing, more of a manifold cleanliness issue. instead of the "pear" connecting the exhaust ports and the little holes(air injection?) above them, they connect directly to the manifold and tend to clog up with junk. just mostly speculation though, since i've never taken a good look at an '85-up manifold