Nissan Skyline S-Chassis Plastic Inserts for Billet Fuel Line BracketsCUSTOM MADE TO ORDER Plastic inserts are machined to suit your specific fuel line sizes. We'll confirm your requirements before manufacturing begins and contact you if we need any further details. Turnaround is generally 1 week from confirmation. Replacement plastic inserts for our billet fuel line brackets. If you already have our billet fuel line brackets but have changed your fuel setup to different sized lines, you can easily swap out the plastic