2strokesmellgud Posted June 30, 2015 Report Share Posted June 30, 2015 This head makes it so much easier to install with the one piece design. At first I wasn't a fan of the acorn topped cool head but after the install it's an improvement over my old noss. Head. Plus uses same domes with only 3 orings. Horsepower wise I didn't notice any seat of pants gains (didn't expect any) but for 25$ cheaper than most heads and easier installation it's a great swap IMO. 3 Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted July 3, 2015 Report Share Posted July 3, 2015 i wonder what head is on my 521. good benefits here. Quote Link to comment Share on other sites More sharing options...
dave5.0 Posted July 4, 2015 Report Share Posted July 4, 2015 Cool. Uses pd style domes or? I wouldn't mind shit canning a few dozen orings. Quote Link to comment Share on other sites More sharing options...
2strokesmellgud Posted July 4, 2015 Author Report Share Posted July 4, 2015 (edited) Note sure on pro design but my noss domes went in without a problem I checked clearance before running it ran fine with the noss domes. Edited July 4, 2015 by 2strokesmellgud Quote Link to comment Share on other sites More sharing options...
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