Do I need a specific bolt size or torque spec to tighten the clamp?

The V-band uses a wedge action rather than precise bolt torque — hand-tight plus a quarter turn is typically all you need. Check your exhaust or tubing system's spec sheet for the exact bolt size and configuration on this clamp.

Can I reuse this clamp if I disconnect it later?

Yes. V-band clamps are designed for multiple connect-disconnect cycles. The stainless steel construction won't degrade from repeated assembly, so you can break it apart and reassemble as needed without losing the seal.

Will this clamp work with my existing 3" tubing, or do I need to machine the flange?

The flange in this set is pre-sized for 3" tubing. If your tubing has a different wall thickness or bore dimension, test-fit it first — you may need to have the flange faced or the tubing ID/OD verified by a machine shop before final installation.