In a Beetle ? Take the drivers and rear seats out first, then form the rear bend in the new pipe, (copy the old pipe for that). Leave the front straight. feed the rear through the hole in the rear chassis outrigger, and connect it to the brass T connector. Then you can gently curve the full length of the new pipe upwards, allowing you to pass the front end under the pedals, and through the hole in the front chassis stiffener (Napoleons Hat). It's even easier if you remove the pedal cluster too. once the front is through, form the bend to connect the pipe to Master cyl., then go along the pipe inside, to straighten, and fit under the clips holding it to central tunnel. That's how I did it, but there may be many other ways.