--- product_id: 16110185 title: "Subaru Coolant System Conditioner 2 Pack - SOA635071 - Genuine OEM" brand: "subaru" price: "£12.68" currency: GBP in_stock: true reviews_count: 9 category: "Subaru" url: https://www.desertcart.co.uk/products/16110185-subaru-coolant-system-conditioner-2-pack-soa635071-genuine-oem store_origin: GB region: United Kingdom --- # Extends head gasket life Optimized for green coolant OEM precision fit Subaru Coolant System Conditioner 2 Pack - SOA635071 - Genuine OEM **Brand:** subaru **Price:** £12.68 **Availability:** ✅ In Stock ## Summary > 🧊 Keep your Subaru cool, clean, and ahead of the pack! ## Quick Answers - **What is this?** Subaru Coolant System Conditioner 2 Pack - SOA635071 - Genuine OEM by subaru - **How much does it cost?** £12.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/16110185-subaru-coolant-system-conditioner-2-pack-soa635071-genuine-oem) ## Best For - subaru enthusiasts ## Why This Product - Trusted subaru brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Pack Convenience:** Two conditioners in one package—ideal for routine maintenance or sharing with a fellow Subaru enthusiast. - • **Genuine Subaru Quality:** Trust the OEM standard for flawless compatibility and performance. - • **Prolongs Engine Vitality:** Helps extend the lifespan of your head gaskets, saving costly repairs down the road. - • **Tailored for Green Coolant:** Specifically engineered to work with Subaru’s green coolant systems for maximum efficiency. - • **Perfect Fit for Iconic Models:** Compatible with 1993-2008 Impreza WRX STI, 1998-2008 Forester, and 1990-2008 Legacy & Outback. ## Overview The Subaru Coolant System Conditioner 2 Pack (SOA635071) is a genuine OEM additive designed exclusively for Subaru vehicles using green coolant. Compatible with popular models from 1990 to 2008, it enhances coolant performance and extends head gasket life, ensuring reliable engine health and optimal cooling system efficiency. ## Description Genuine Subaru Coolant Conditioner. Good idea to use on your Subaru when you do a coolant flush. This will help the extend the head gaskets. Used only with cars with green coolant. Your package will include the following items: Subaru Genuine Coolant Cond. SOA635071 x2. Don't settle for aftermarket components of questionable quality and always insist on Genuine Subaru replacements. Fits: 1993-2008 Impreza Wrx STI 1998-2008 Forester 1990-2008 Legacy and Outback Review: Holy crap it worked - Holy crap it worked! I am always very skeptical of the "fix in a bottle" products and I still maintain that if your head gaskets are leaking and you are planning on keeping the car for a while, you should just pony up the $1500 to do them (and do the timing belt while you're in there). In my situation though, I knew I was getting rid of the car in just a few months and only needed it for some light driving in the meantime. Before forking over nearly 2k to the mechanic who had diagnosed bad head gaskets, I read on a forum somewhere about this stuff and after seeing a lot of positive reviews here decided to give it a shot. For $12 I really didn't have much to lose! The one thing I was worried about was it clogging up the heater core or thermostat, as some of the other "head gasket in a bottle" products out there are known to do. Per instructions on the bottle, you can just pour it into the radiator and drive. I put 2 bottles in my radiator after removing a small amount of coolant to make room. At first I was disappointed as after my initial test drive I was still seeing smoke under the hood but after a bit of driving it was gone. I suspect it was just remaining coolant on the engine block burning off. After 3 weeks of daily driving, the car seems to be 100% fine (for the moment). It's worth mentioning that this stuff will really only work as a band aid fix like this if it is an EXTERNAL headgasket leak. Generally, those are the much less severe head gasket leaks. My symptoms before using this stuff where minimal. No overheating at all, no coolant in the oil/ vice versa, no bubbles in the coolant overflow tank. The only sign was after driving it would puff smoke out of the hood and a smell of burning coolant while driving. I took it to my mechanic who took one look at the heads and told me I'd have to do them. He showed me with a flashlight and sure enough I could see green coolant liquid seeping through the heads. Trying to fix a major internal head gasket leak with this stuff is like trying to plug a leaking dam with your finger, it just wont work. Review: WOW! - I purchased this coolant conditioner suggested by a local mechanic for a heater core leak in my 2001 Jeep Grand Cherokee 4.0. I was having to fill my reservoir tank 2 to 3 times a week. I had a permanent wet spot in my driveway. Went to this reputable local mechanic and as he charged strictly by the book hours to replace my heater core, cost to repair was going to be $450. After turning down his estimate and deciding to live with the problem, he offered information about this coolant conditioner that he used in a dragster he owned and raced. I purchased the two bottles and installed it as per YouTube videos and within 2 days my leak was stopped and has not returned for a year now (knock on wood). I only used one bottle for my fix so I gave the other bottle to a friend that had a leaky system on a farm tractor and bam it fixed that also. GREAT STUFF! saved me $442 in repairs. Highly recommended! ## Features - Used only with cars with green coolant - Subaru Genuine Coolant Conditioner SOA635071 x2 - 1993-2008 Impreza WRX STi - 1998-2008 Forester - 1990-2008 Legacy and Outback ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00WFI0W2Q | | Best Sellers Rank | #49,488 in Automotive ( See Top 100 in Automotive ) #38 in Automotive Replacement Engine Coolant Recovery Kits | | Brand | Subaru | | Customer Reviews | 4.6 4.6 out of 5 stars (706) | | Date First Available | April 20, 2015 | | Item Weight | 10.2 ounces | | Item model number | SOA635071 | | Manufacturer | Subaru | | Manufacturer Part Number | SOA635071 | | Package Dimensions | 4.65 x 2.6 x 2.52 inches | ## Images ![Subaru Coolant System Conditioner 2 Pack - SOA635071 - Genuine OEM - Image 1](https://m.media-amazon.com/images/I/51hkBseQe3L.jpg) ## Questions & Answers **Q: should i use this in my 2011 forester that has no leaks at 160000 miles just for insurance?** A: I used it in my 2011 Forester per user manual around 130k with the coolant drain and change (did not flush or change thermostat). Now at 155k I havent had any problems (or headgasket leaks as the dealer informed me). The Radiator is old and cracking now so I would replace that all together this time along with water pump. **Q: Do I use both bottles or just 1** A: Some Subaru models are notorious for head gasket issues. Subaru developed this additive with Holts to prevent problems from faulty head gaskets. Use one of these every time you do you your 30,000 miles coolant flush. If adding it before your next flush, just remove 4oz from your radiator (when cool). It is a brown goupy solution with chunks, you must shake VERY well before pouring. Some owners swear by this stuff, some are mad they have to use it in the first place, and some put it in and forget it. Recently has seen widespread use in non-Subaru makes because of it's excellent performance compared to other Stop Leak products. If your car is showing signs of head gasket issues, it is advised to try this out, and then use it with every coolant flush. Other head gasket failure preventions: - Make sure your battery terminals are corrosion free **Q: Can I use this in turbocharged engine?** A: Most places online say it wasn't meant for turbo models. That doesn't necessarily mean it won't work if you have a coolant leak. It's a rebranded product made a British Company called Holts. The Holts product name is Radweld. Subaru rebranded it for use in a recall of 99-2002 ej25 models with weak head gasket material. Those are not turbo model engines, but the turbo models weren't recalled for it, if that helps. If you have a coolant leak, it's worth a try. It's cheaper than replacing a head gasket. **Q: Can this cooling system conditioner be used in vehicles other than subarus? or is it designed to be used only in subaru vehicles?** A: any vehicle ## Customer Reviews ### ⭐⭐⭐⭐⭐ Holy crap it worked *by K***R on January 23, 2017* Holy crap it worked! I am always very skeptical of the "fix in a bottle" products and I still maintain that if your head gaskets are leaking and you are planning on keeping the car for a while, you should just pony up the $1500 to do them (and do the timing belt while you're in there). In my situation though, I knew I was getting rid of the car in just a few months and only needed it for some light driving in the meantime. Before forking over nearly 2k to the mechanic who had diagnosed bad head gaskets, I read on a forum somewhere about this stuff and after seeing a lot of positive reviews here decided to give it a shot. For $12 I really didn't have much to lose! The one thing I was worried about was it clogging up the heater core or thermostat, as some of the other "head gasket in a bottle" products out there are known to do. Per instructions on the bottle, you can just pour it into the radiator and drive. I put 2 bottles in my radiator after removing a small amount of coolant to make room. At first I was disappointed as after my initial test drive I was still seeing smoke under the hood but after a bit of driving it was gone. I suspect it was just remaining coolant on the engine block burning off. After 3 weeks of daily driving, the car seems to be 100% fine (for the moment). It's worth mentioning that this stuff will really only work as a band aid fix like this if it is an EXTERNAL headgasket leak. Generally, those are the much less severe head gasket leaks. My symptoms before using this stuff where minimal. No overheating at all, no coolant in the oil/ vice versa, no bubbles in the coolant overflow tank. The only sign was after driving it would puff smoke out of the hood and a smell of burning coolant while driving. I took it to my mechanic who took one look at the heads and told me I'd have to do them. He showed me with a flashlight and sure enough I could see green coolant liquid seeping through the heads. Trying to fix a major internal head gasket leak with this stuff is like trying to plug a leaking dam with your finger, it just wont work. ### ⭐⭐⭐⭐⭐ WOW! *by W***N on December 25, 2024* I purchased this coolant conditioner suggested by a local mechanic for a heater core leak in my 2001 Jeep Grand Cherokee 4.0. I was having to fill my reservoir tank 2 to 3 times a week. I had a permanent wet spot in my driveway. Went to this reputable local mechanic and as he charged strictly by the book hours to replace my heater core, cost to repair was going to be $450. After turning down his estimate and deciding to live with the problem, he offered information about this coolant conditioner that he used in a dragster he owned and raced. I purchased the two bottles and installed it as per YouTube videos and within 2 days my leak was stopped and has not returned for a year now (knock on wood). I only used one bottle for my fix so I gave the other bottle to a friend that had a leaky system on a farm tractor and bam it fixed that also. GREAT STUFF! saved me $442 in repairs. Highly recommended! ### ⭐⭐⭐⭐⭐ Got to have some *by T***N on September 7, 2026* Helps with cooling ## Frequently Bought Together - Subaru OEM Coolant System Conditioner - SOA635071-2 Pack - Subaru Genuine Super Coolant Blue Prediluted SOA868V9272 1 Gallon Pre Mixed 50/50 2009 and Newer Ascent BRZ Crosstrek Forester Impreza Legacy Outback WRX --- ## 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.co.uk/products/16110185-subaru-coolant-system-conditioner-2-pack-soa635071-genuine-oem](https://www.desertcart.co.uk/products/16110185-subaru-coolant-system-conditioner-2-pack-soa635071-genuine-oem) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-10-11*