--- product_id: 21520837 title: "TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring" brand: "throttle body shop" price: "$54.04" currency: USD in_stock: true reviews_count: 3 url: https://www.desertcart.us/products/21520837-tbs-10321-gm-tbi-18-psi-brown-fuel-pressure-spring store_origin: US region: United States of America --- # 18 psi fuel pressure boost Supports high-performance mods OEM regulator fitment TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring **Brand:** throttle body shop **Price:** $54.04 **Availability:** ✅ In Stock ## Summary > ⛽ Elevate your fuel game—because your GM deserves the pressure boost it craves! ## Quick Answers - **What is this?** TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring by throttle body shop - **How much does it cost?** $54.04 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/21520837-tbs-10321-gm-tbi-18-psi-brown-fuel-pressure-spring) ## Best For - throttle body shop enthusiasts ## Why This Product - Trusted throttle body shop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Upgrade-Ready:** Designed for modified motors—pair with a fuel pump upgrade to unlock full potential. - • **Iconic Vehicle Fit:** Perfect for Silverado, Sierra, Suburban, Yukon, Blazer, Camaro, Firebird, Caprice, S10, and Jimmy models. - • **Power-Up Your Ride:** Boosts stock TBI fuel pressure from 11-12psi to a robust 18-19psi for enhanced engine performance. - • **Engineered for Endurance:** Crafted from durable alloy steel to withstand high temperatures up to 120°C. - • **Seamless OEM Compatibility:** Direct replacement spring fits 1986-95 GM TBI motors without hassle or modification. ## Overview The TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring is a high-quality alloy steel replacement spring designed to increase fuel pressure from 11-12psi to 18-19psi in 1986-95 GM TBI motors. It fits OEM regulator cans and supports performance upgrades, requiring a compatible fuel pump for optimal operation. Ideal for a range of classic GM vehicles, this spring delivers reliable, heat-resistant performance for enthusiasts seeking enhanced engine efficiency. ## Description GM TBI 18psi Brown fuel regulator replacement spring for 1986-95 GM TBI motors ## Features - TBI 18psi Brown fuel regulator replacement spring Fits: 1986-95 2.8L 4.3L 5.0L 5.7L 7.4L TBI motors - For modified motors it bumps stock TBI fuel pressure from 11-12psi to 18-19psi - fits OEM regulator can - This spring will require a fuel pump upgrade for the increased pressure - see our store for this - Silverado Sierra Suburban Yukon Blazer Camaro Firebird Caprice S10 Jimmy - Color is to help identify this spring within our product line and is not intended to match OEM spring colors - color may vary slightly from description photo ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B012XJ08NO | | Best Sellers Rank | #1,027,295 in Automotive (See Top 100 in Automotive) #912 in Automotive Replacement Fuel Injection Pressure Regulators | | Brand Name | Throttle Body Shop | | Customer Reviews | 4.5 4.5 out of 5 stars (42) 4.5 out of 5 stars | | Manufacturer | Throttle Body Shop | | Material Type | Alloy Steel | | Part Number | TBS-10321 | | Temperature Range | 1.2E+2 Degrees Celsius | | Unit Count | 1 Count | ## Product Details - **Material:** Alloy Steel - **Brand:** Throttle Body Shop - **Color:** Brown - **Manufacturer:** Throttle Body Shop - **Unit Count:** 1 Count ## Images ![TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring - Image 1](https://m.media-amazon.com/images/I/61dO-It5D0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 87 to 95 tbi. With up grads. Is a.must have *by on Reviewed in the United States February 9, 2024* 87 to 95 tbi up grade regulatory to 18psi a.must when you up grade the pump a 96 factory vortec pump. Our a warbor perfomace pump up grade ### ⭐⭐⭐ It won't boost your 55# injectors to 72#. *by on Reviewed in the United States October 21, 2022* The seller implies on his webpage that this spring boosts most injectors to a flow rate of about #72. The real truth is that you already need to have 65# injectors to reach 72# like he claims. The truth is that most people have #55lb injectors, not the #65 required to boost them to the #72 he implies. This will only boost a set of #55 injectors to 65#, far short of enough to support the 270 horsepower implied on his webpage. He implies this spring avoids the purchase of higher flow injectors. That's false for the large majority of us. ### ⭐⭐⭐ Three Stars *by on Reviewed in the United States November 18, 2015* Shipping was fast and product worked as hoped ## Frequently Bought Together - Throttle Body Shop TBS 10321 GM TBI 18 psi Brown Fuel Pressure Spring - Standard Motor Products 1704 TBI Kit - Throttle Body Shop TBS 10201 1/4" TBI Injector Spacer 1986-95 Gm TBI Motors --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/21520837-tbs-10321-gm-tbi-18-psi-brown-fuel-pressure-spring](https://www.desertcart.us/products/21520837-tbs-10321-gm-tbi-18-psi-brown-fuel-pressure-spring) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*