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Old 02-13-2018, 10:26 AM   #1
aldecam
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Default 2007 STI: Looking for great set of Coilovers. AST 5100 or FEAL 441

Hello,

I have an older 07 STI.

The car was a daily driver with the occasional track day, now itll be relegated to the occasional around town driver with more dedicated track time.

Iíd like some input from the community.

Iím looking for a good versatile coilover package. Something thatís composed on the street but can be properly tuned for a twisty trackday.

Iíve heard good things from the AST vendors and customers, they seem like a great, high quality package. Iíve heard similar accounts from the FEAL 441 crowd.

The biggest difference I see is price point.
Youíre saving almost $1k with the FEAL Set.

I understand that both are monotube, inverted systems. Where is the real difference between both sets and are there other brands that are competitive to these purveyors ?

Thanks.
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Old 02-13-2018, 11:35 AM   #2
T-37
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I would lean heavily towards AST. They also list a dual digressive piston option. You can also look at RCE Tarmac 2s, 1s or 0s or KW V3s, V2s or V1s in that same pricerange

Something to take into consideration is that the ASTs, and RCE/KWs do not include tophats/camber plates, so you will have to either reuse the stock ones or purchase them.
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Old 02-13-2018, 12:47 PM   #3
Mike_Feal
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The Feal are not inverted which means you do not have to worry about the extra maintenance of greasing the housing in between services. the 441 also include front camber plates, rear top hats, and an available rear camber plate with spherical bearings at all corners. The valving on the standard 441 has a slight digressive curve since that seems to be a concern. Typically you would not want a road car to be extra digressive as it will be very firm at slower speeds and can be harsh on the streets. Couple that all with Swift springs standard at a much lower price it's one of the best "bang for your buck" option available.

I suggest looking into some reviews of the Feal's to see what NASIOC thinks about them. There are a ton of thorough reviews and most are overwhelmingly positive.
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Old 02-13-2018, 02:21 PM   #4
mrsaturn7085
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I would say you are comparing two different levels of suspension. The 4100 AST set would probably be more apples-to-apples and frankly, you couldn't go wrong with either set.

Two benefits that Feal suspension will have is a company that is highly responsive to communication from the customers and easier access to rebuilds.

The quality is also there with AST, but all your communication/rebuilds will essentially be going through a dealer rather than direct.

I believe rebuild costs are comparable. If you can find a lightly used set of either one at a killer price, that would be an easy way to decide.
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Old 02-13-2018, 03:03 PM   #5
Mike_Feal
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Feal rebuilds are $100 per corner and turnaround is 5 business days, we also rebuild AST for $175 per corner. I am not sure what the AST are through AST directly or through other dealers to be honest. Most rebuild places like PSI are quite a bit more expensive than us and we have been finding ourselves with more outside brand rebuilds than ever before.
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Old 02-13-2018, 04:17 PM   #6
mrsaturn7085
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Might as well consider it $350 a pair for AST - last time I had mine rebuilt they wouldn't do only one corner even though I only had a single corner with a seized adjuster.
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Old 02-13-2018, 05:09 PM   #7
jamal
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I would strongly consider the Racecomp Engineering Tarmac 2. They have those pretty dialed in for these cars.

Quote:
Originally Posted by mrsaturn7085 View Post
I would say you are comparing two different levels of suspension. The 4100 AST set would probably be more apples-to-apples and frankly, you couldn't go wrong with either set.
AST doesn't make the 4100 anymore but did lower the price a bit on the 5000 series.
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Old 02-13-2018, 08:50 PM   #8
Mike_Feal
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Quote:
Originally Posted by mrsaturn7085 View Post
Might as well consider it $350 a pair for AST - last time I had mine rebuilt they wouldn't do only one corner even though I only had a single corner with a seized adjuster.
We can do a single corner but strongly recommend sending in pairs. You don't want one side with broken down oil and one side like brand new, it won't feel right when driving.
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Old 02-14-2018, 01:03 AM   #9
aldecam
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Default 2007 STI: Looking for great set of Coilovers. AST 5100 or FEAL 441

Great stuff.

Thanks for all the info.

@ Mike_Feal , thank you for chiming in and offering great pricing on rebuilds, even for the AST sets.

I was doing some research on the AST 5100 with the DPP option, Iím not entirely sure on its benefits for my needs as I was also looking into the 441 with either the road race or max travel options.

As someone mentioned above concerning the 4100. Theyíre not made anymore. I remember the TiC tuned SST 4100 Which were basically the best coilovers for the GD chassis in those days. Iíve also great things about the Tarmac 2s and free rebuilds are hard to ignore.

But technical write ups are hard to put up against real world experiences.

Thanks.
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