Quote:

It was kinda a Joke, they are 4 inch 19.5 inchs long merge with 2 1/8 primary in.

That collector should be just fine like that.

I was surprised at the total overall primary tube length (19+19=38"). But I like the 2-step diameters you are going to use.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1