So my car is pushing quite a bit of power and stock 275/35/20 can't keep up , even spinining around 45 mph on dry pavement 😆. Latest modifications as pictured. Finished up prototyping and now final development for the intake system. Uses paper oem type of filtration, but it's double the size of the original volume plus velocity stack inside so flows more . Showing easy 15 horsepower gain so far Possible heat shield option as well but so far it's not an issue. Found a pair of 305/35/20 anyone fit such size on factory 20s?

 

Well I'm answering my own question 305s fit just fine ! although I did go with 305 by 30 20 instead of by 35