Find the right exhaust in three steps: choose your motorcycle brand, select the exact model, then compare exhaust styles. The shopping path matches how riders actually buy performance parts.
The three-level finder should be more than a navigation menu. Use brand pages for SEO, model pages for fitment confidence, and exhaust-style pages for conversion.
Exhaust buyers compare material, weight, sound, and install difficulty. Surface these choices early so riders do not need to open every product page.
Store brand, model, year range, engine size, exhaust style, material, DB killer status, and ECU requirements as editable theme data or product metafields. Future product updates should happen in Shopify Admin, not by rewriting the page code.