--- product_id: 3199376 title: "AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v" brand: "autotechsalon" price: "€ 5.16" currency: EUR in_stock: false reviews_count: 2 url: https://www.desertcart.hr/products/3199376-autotechsalon-premium-slimline-h4-9003-hb2-100w-pnp-ceramic-relay store_origin: HR region: Croatia --- # 30-50% output boost Plug & play install 100w wattage support AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v **Brand:** autotechsalon **Price:** € 5.16 **Availability:** ❌ Out of Stock ## Summary > Illuminate Your Drive! πŸ’‘ Upgrade Your Headlights Today! ## Quick Answers - **What is this?** AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v by autotechsalon - **How much does it cost?** € 5.16 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/3199376-autotechsalon-premium-slimline-h4-9003-hb2-100w-pnp-ceramic-relay) ## Best For - autotechsalon enthusiasts ## Why This Product - Trusted autotechsalon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Unleash the Power:** Experience a 30-50% increase in bulb output with a simple installation. - β€’ **Space-Saving Design:** New flexible rubber insulation reduces space by over 50% for a sleek look. - β€’ **Complete Upgrade Kit:** Includes industrial-strength zip ties for a tidy finish. - β€’ **Robust Compatibility:** Ceramic plugs safely support aftermarket bulbs up to 100w. - β€’ **Effortless Installation:** Enjoy a hassle-free, plug-and-play setup in just 30 minutes. ## Overview The AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster is designed to enhance your vehicle's lighting performance. With a straightforward plug-and-play installation, it boosts bulb output by 30-50% while maintaining vehicle integrity. The innovative rubber insulation offers significant space savings and flexibility, making installation a breeze. This product supports aftermarket bulbs up to 100w and comes with bonus zip ties for a complete upgrade solution. ## Description Our best in the industry H4 ceramic fused headlight wiring harness just got better for 2015! We listened to all your feedback and suggestions, and incorporated all the vital improvements necessary to make this THE best h4 PLUG AND PLAY upgrade harness money can buy, period! Ever notice how your headlight bulbs simply seem dull or get dimmer at night when you have other accessories on such as your defroster/stereo/AC/ etc? That's where this harness comes in! Stock OEM headlight harnesses and plugs are simply unable to handle the heavy loads of day to day driving while maintaining maximum power efficiency. Utilizing this completely plug and play kit, you will notice a significant increase in brightness and output from your vehicles' stock or aftermarket h4 halogen bulbs due to your lights now drawing power more efficiently from your battery. Comes with everything out of the box needed to upgrade your flimsy, OEM h4 headlight sockets and wiring to the highest quality, precision engineered ceramic sockets. The pics speak for themselves, these harnesses are top quality throughout and feature the best components to ensure both a safe and economical upgrade to any h4 bulb equipped motorcycle or vehicle. Features all 24k gold plated contacts for maximal power transfer and efficiency, a revised monoblock relay input assembly, and new custom fit puncture and electromagnetic shielded rubber insulation for an over 50% space conservation over our competition! An inline 40 amp replaceable blade fuse (included) ensures your vehicles engine compartment and electrical components do not incur any damage in case of a shortage or voltage spike. Experience the difference today, with brighter lit roads and increased night driving safety! ## Features - Typical results yield at least a 1 volt increase to the bulb socket leads, resulting in 30-50% greater output from your stock or aftermarket halogen bulbs. - Simple plug and play 30 minute installation...zero messy cutting or splicing. Retain all original vehicle integrity and functionality. - NEW Custom snug-fit flexible rubber insulation tubing offers a space saving of over 50% over our previous version's loose-fit ribbed plastic insulation. MUCH greater wire flexibility for tight angles + vastly increased space saving = a far more elegant and streamline installation - All ceramic output plugs support aftermarket bulb wattages up to 100w safely and effectively. - Includes 3 industrial strength translucent zip ties as a bonus, for a complete 'out of the box' upgrade solution ## Images ![AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v - Image 1](https://m.media-amazon.com/images/I/719B7QKOxsL.jpg) ![AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v - Image 2](https://m.media-amazon.com/images/I/71nMTPDHOQL.jpg) ![AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v - Image 3](https://m.media-amazon.com/images/I/71Oq5iMXsxL.jpg) ![AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v - Image 4](https://m.media-amazon.com/images/I/71QX+dzr9VL.jpg) ![AutoTechSalon Premium Slimline H4 9003 HB2 100w PnP Ceramic Relay Wiring Harness Bulb Headlight Foglight Booster 12v - Image 5](https://m.media-amazon.com/images/I/61oP+rmWrPL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy installation. Much easier than getting relays and making ... *by S***H on Reviewed in the United States πŸ‡ΊπŸ‡Έ on October 23, 2015* Easy installation. Much easier than getting relays and making one of your own. So if you're looking for something quick and easy or you don't have the mechanical inclination to do so. This is a good wiring upgrade for your headlights. ### ⭐⭐⭐⭐⭐ Five Stars *by P***L on Reviewed in the United States πŸ‡ΊπŸ‡Έ on November 6, 2015* great! works well! --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/3199376-autotechsalon-premium-slimline-h4-9003-hb2-100w-pnp-ceramic-relay](https://www.desertcart.hr/products/3199376-autotechsalon-premium-slimline-h4-9003-hb2-100w-pnp-ceramic-relay) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-22*