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These Smog Block Off Plates are made from machined aluminum
Advanced packing material for maximum longevity
The brushed aluminum body and stainless steel inlet tube and end-cap gives you a silencer that looks as good as it performs
This exhaust system modification results in a boost in performance and noticeable weight reduction
Slip-on mufflers represent the first step in the exhaust system tuning process
DYNOJET Jet Kit - Honda CRF250R 1173 Motorcycle Jumper Cables These Smog Block Off PlatesStage 1: stock engine filters, stock modified pipes; about a 5% power increase Stage 1: stock engine filters, stock modified pipes; about a 5% power increase Stage 2: stock mild modified engine, stock modified pipes, stock modified filters; about an 8% power increase Stage 3: stock mild modified engine, stock modified pipes, individual air filters; driveability may be compromised, N A for some motors; about a 10 15% power increase Stage 7: race only,