{"product_id":"prl-motorsports-subframe-reinforcement-system-16-26-civic-integra","title":"PRL Subframe Reinforcement Collars for 16-26 Civic\/Integra","description":"\u003cul\u003e\n\u003cli\u003eSharper Steering Response \u003c\/li\u003e\n\u003cli\u003eFitments for 10th and 11th Gen Civic and New Integra \u003c\/li\u003e\n\u003cli\u003eMachined 6061, Black Anodized \u003c\/li\u003e\n\u003cli\u003eFills The 2mm Factory Subframe Gap \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003ePRL Motorsports Subframe Reinforcement Collars - Civic \u0026amp; Integra\u003c\/h3\u003e\n\n\u003cp\u003eHonda leaves 2mm of slack around your subframe bolts. The mounting holes are 2mm larger than the bolts that pass through them, which lets the subframe shift under load. Since your suspension and steering all mount off that subframe, any movement there shows up as vagueness in how the car responds. These collars fill that gap precisely, so the subframe stays put.\u003c\/p\u003e\n\n\u003ch4\u003eWhy Honda Leaves The Gap\u003c\/h4\u003e\n\n\u003cp\u003eWorth understanding, because it's deliberate rather than an oversight.\u003c\/p\u003e\n\n\u003cp\u003eThe oversized holes make assembly easier on the production line, since a 2mm margin means the subframe drops into place without fighting perfect alignment. It also allows a little compliance, which Honda tunes for comfort and to keep vibration out of the cabin.\u003c\/p\u003e\n\n\u003cp\u003eThat's a reasonable set of priorities for a car built for everyone. It's the wrong set if you're chasing steering sharpness, because that same slack lets the subframe move exactly when you're loading it hardest.\u003c\/p\u003e\n\n\u003ch4\u003eWhat The Slack Costs You\u003c\/h4\u003e\n\n\u003cp\u003eThe movement is small, but its effect isn't.\u003c\/p\u003e\n\n\u003cp\u003eEverything that steers and suspends the car bolts to the subframe. When the subframe shifts within that 2mm of play, your suspension geometry moves with it, momentarily, right in the middle of a corner or under hard braking.\u003c\/p\u003e\n\n\u003cp\u003eWhat you feel is vagueness. Steering that responds a beat late, a limit that feels softer than it should, and sometimes rattles or vibration as the subframe takes up the slack. It's subtle enough that people live with it without knowing it's there, the same way they do with worn steering rack bushings.\u003c\/p\u003e\n\n\u003ch4\u003eThe Fix Is Precise\u003c\/h4\u003e\n\n\u003cp\u003eThe collars fill the 2mm gap exactly, sleeving the space between the bolt and the hole.\u003c\/p\u003e\n\n\u003cp\u003eWith the gap closed, the subframe can't shift. It's clamped in a fixed position, which means your suspension geometry stays where it was designed to be through the whole corner rather than moving under load. The result is sharper steering response, a more defined limit, and less vibration reaching the cabin.\u003c\/p\u003e\n\n\u003cp\u003eThis is one of the cheapest genuine handling improvements available on these cars, because it's fixing looseness rather than changing a spring rate or a bushing durometer. You're removing slack the car should never have had.\u003c\/p\u003e\n\n\u003ch4\u003eMachined 6061, Anodized\u003c\/h4\u003e\n\n\u003cp\u003eThe collars are machined from 6061 aluminum and black anodized. That matters because they have to fit the 2mm gap precisely, which requires tight machining tolerances, and they have to survive underneath the car indefinitely.\u003c\/p\u003e\n\n\u003cp\u003eAluminum handles that environment well, and the anodizing resists corrosion where they're exposed to road salt and water. Fit them once and they stay effective.\u003c\/p\u003e\n\n\u003ch4\u003eNo Comfort Penalty Worth Worrying About\u003c\/h4\u003e\n\n\u003cp\u003eWorth addressing, since rigid suspension parts often trade comfort for precision.\u003c\/p\u003e\n\n\u003cp\u003eLocating the subframe firmly does let slightly more vibration through than the factory slack allowed, since some of that gap was there to isolate the cabin. But it's minor, and it's the good kind of feedback, the road talking to you rather than harshness for its own sake.\u003c\/p\u003e\n\n\u003cp\u003eOn a car being set up for handling, that's a trade almost everyone makes gladly. It's nothing like the NVH increase a spherical bearing or solid mount introduces.\u003c\/p\u003e\n\n\u003ch4\u003ePairs With The Chassis Braces\u003c\/h4\u003e\n\n\u003cp\u003eWorth knowing if you're serious about tightening up the chassis, because these two work on the same problem from different angles.\u003c\/p\u003e\n\n\u003cp\u003eThe collars stop the subframe shifting within its mounting holes. The \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/prl-motorsports-chassis-brace-upgrade-16-21-civic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePRL chassis braces\u003c\/a\u003e tie the larger structure together so the chassis itself flexes less under load. One removes slack at the mounting points, the other stiffens the platform those points are attached to.\u003c\/p\u003e\n\n\u003cp\u003eRun both and you've addressed chassis movement comprehensively rather than partially. Either is a real improvement on its own, but together they're how you get the tightest, most responsive front end these cars will give you.\u003c\/p\u003e\n\n\u003ch4\u003eMatch Your Generation\u003c\/h4\u003e\n\n\u003cp\u003eThe 10th and 11th gen use different subframes, so the collars aren't interchangeable. Order the kit for your chassis.\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003ePart Number\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eFits\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHC10-SRS\u003c\/td\u003e\n            \u003ctd\u003e2016-2021 Honda Civic (Sport, Si) and 2017-2021 Civic Type R (FK8)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHC11-SRS\u003c\/td\u003e\n            \u003ctd\u003e2022-2026 Honda Civic (Si, Sport), 2023-2026 Civic Type R (FL5), 2023-2026 Acura Integra (Base, A-Spec), 2024-2026 Integra Type S (DE5)\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cp\u003e2016-2021 Honda Civic Sport and Si\u003cbr\u003e2017-2021 Honda Civic Type R (FK8)\u003cbr\u003e2022-2026 Honda Civic Si and Sport\u003cbr\u003e2023-2026 Honda Civic Type R (FL5)\u003cbr\u003e2023-2026 Acura Integra Base and A-Spec\u003cbr\u003e2024-2026 Acura Integra Type S (DE5)\u003c\/p\u003e\n\n\u003cp\u003eSelect your chassis at checkout.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Run These\u003c\/h4\u003e\n\n\u003cp\u003eThis is for the owner who's chasing steering precision and would rather fix looseness than add stiffness, and for anyone setting a car up for track or autocross where response matters. It's inexpensive, it's a genuine handling improvement, and it addresses slack the car came with rather than a wear item. Fit them and feel the front end sharpen up.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e see the table above. \u003cstrong\u003ePart numbers:\u003c\/strong\u003e HC10-SRS (16-21 Civic \/ FK8) and HC11-SRS (22-26 Civic \/ FL5 \/ Integra \/ DE5). \u003cstrong\u003eFunction:\u003c\/strong\u003e fills the 2mm factory subframe bolt gap to eliminate slack. \u003cstrong\u003eConstruction:\u003c\/strong\u003e machined 6061 aluminum, black anodized. \u003cstrong\u003eBenefits:\u003c\/strong\u003e sharper steering response, increased chassis rigidity, reduced vibration under load. \u003cstrong\u003ePairs with:\u003c\/strong\u003e \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/prl-motorsports-chassis-brace-upgrade-16-21-civic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePRL chassis braces\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e2023-2026 Acura Integra Base\/ASpec\u003cbr\u003e2024-2026 Acura Integra Type S\u003cbr\u003e2016-2021 Honda Civic Sport\/Si\u003cbr\u003e2017-2021 Honda Civic Type R\u003cbr\u003e2022-2026 Honda Civic Si\/Sport\u003cbr\u003e2023-2026 Honda Civic Type R\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"PRL Motorsports","offers":[{"title":"16-21 Civic\/FK8 Type R","offer_id":47658516971554,"sku":"PRL-HC10-SRS","price":260.0,"currency_code":"USD","in_stock":false},{"title":"22-26 Civic\/FL5 Type R\/23-26 Integra\/DE5 Type S","offer_id":47658517004322,"sku":"PRL-HC11-SRS","price":260.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/prl-subframe-reinforcement-col_seeo.jpg?v=1789758788","url":"https:\/\/www.hybrid-racing.com\/products\/prl-motorsports-subframe-reinforcement-system-16-26-civic-integra","provider":"Hybrid Racing","version":"1.0","type":"link"}