Genesis flavorizer bars do the same job as Spirit bars at a longer length. That length is why a “Weber flavorizer” search returns Spirit kits that rattle around in a Genesis box and dump fat into the ports.
Confirm they are actually done
- Daylight through the peak.
- Ends crumbled off the box notches.
- A bar that has flattened so it no longer sheds to the sides.
- Heavy rust on the sides with an intact peak can wait a season if you degrease and watch the ports.
- Genesis II bars can look similar to original Genesis bars and still differ at the notch. Measure.
Measure and shop
- Cold grill. Grates off. Count bars (usually three on E-310 / II E-310). E-335 sear burner is not a flavorizer problem.
- Measure length and V width. Photograph the notch shape.
- Search Amazon or BBQGuys for Weber Genesis E-310 flavorizer or Genesis II E-335 flavorizer as appropriate. Compare listed length to the tape. We do not invent part numbers.
- Stainless aftermarket is reasonable if the gauge looks honest and the return path is clear. Thin stampings warp across a Genesis-width box.
Swap
- Gloves. Lift old bars. Scrape the notches level.
- Set new bars with each peak over a tube. Stand at the front and sight down the box. You should not see a port row in a valley.
- On Genesis II E-335, keep bars off the sear burner. Do not invent a fourth flavorizer that blocks the infrared or the sear tube.
- Grates on. Preheat. If flame licks a tube through a gap, shift the bar before the first fatty cook.
After the swap
- New bars smoke once. Stay nearby.
- If ports were already packed, clean them now.
- Bars lace and tubes perforated and box floor thin → do not buy a full Genesis parts cart. Read repair versus replace. A Genesis box in good shape is worth bars and tubes. A lace box is a BBQGuys browsing session.
Not affiliated with Weber.