Depends on where you plan to route it. Regardless 6 to 10 feet will be more than enough
Corksil wrote:Build it right, build it once.
1991 TGP CRX Si: b18a1, spec-d, tein, konig
1985 Prelude: stock A18 dual carb
1993 MR Civic CX: b16a2, skunk2, autometer, magnaflow, etc. (traded for rex)