Wirelessly connect your JB4 to your phone!
For JB4 systems produced 2017 and later. Please check board diagrams to properly identify your JB4 before ordering. For use with JB4 only
This is a direct replacement filter for all IE cold air intakes with a 5" velocity stack on the heat shield. This filter is used on the majority of all IE intakes.
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Featuring silver fine wire center electrode - Superior ignition ability increases engine power!
One heat range colder than stock with a non-projected tip
Brand:
ES#:
3521624
Mfg#:
ER12S
In Stock
8% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$12.99
This product was last offered at the strikethrough price on 07-29-2026
Offers decreased drivetrain movement, crisper shifting, and reduced wheel hop, with minimal noticeable increase in noise, vibration, or harshness (NVH).
Add 8V RS3/B9 S4 spark with these red top coil packs and Brisk Silver Racing ER12s plugs, ensuring a stronger and more consistent spark!
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Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.
Lifetime Replacement
