TTI Shorty Headers

Coronet try the try whys as yes they will be easier to install and as long as you are not reving it to the moon will produce a good power curve. I live in australia so we have very little to choose in the way of headers as your USA one will not fit our aussie r/h drive cars. My 410 stroker has a very mild cam in it but made 355 rwhp on a chassis dyno and has run a best of 11.5 @ 120 mph. It had try wys (1 5/8 to 1 7/8 to 2 1/2 collector. We are now able to update to the bigger header ( 1 3/4 to 2 inch to 3 inch collector) I had it dynoed and it produced 397 rwhp, a gain of 42 rwhp. I have not run it at the qtr yet as I had a slipping clutch and have been putting a very trick twin plate unit in so I will run it shortly to see the qtr improvement.