Rennlist

C2 coilovers on lightened 4S?

Add to repair workspace

New repair projectOpen repair workspace

Original source

2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHC2 coilovers on lightened 4S?

Reported or suspected cause

good 60lbs lighter than stock

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that suspect a cause: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause · Original poster
In the rear my car has a cup exhaust, no back seats, no subwoofer, and the rear is probably a good 60lbs lighter than stock.
Original post Read captured discussion
C2 coilovers on lightened 4S?

Read full discussion summary

Leading evidence: 'good 60lbs lighter than stock' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'good 60lbs lighter than stock' (1 discussions; 0 report identifying it and 1 suggest it). No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 2 captured posts examined · 0 partial discussions

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

good 60lbs lighter than stock

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause · Original poster
In the rear my car has a cup exhaust, no back seats, no subwoofer, and the rear is probably a good 60lbs lighter than stock.
Original post Read captured discussion
C2 coilovers on lightened 4S?

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all, While I sort out the issues with my ECU, I am on to other projects on my '03 4S. As many other have noted on their 4Ss, I hate the way my car is dampened. I like a firm, taught ride, but I don't like jarring. I think the car is sprung perfectly, I think the rebound is just fine, but I have no idea what they were thinking with the compression on these oem struts. It might be confirmation bias, but I seem to not be the only one by a long shot that feels this was about the OEM 4S suspension. I'd like to be able to corner balance the car, and improve ride quality at the same time. There are numerous threads that mention getting both from a decent set of coil overs. I can't right now justify the extra $1,000 on a set of PSS10s vs HR Streets, so I think I will get the streets. As mentioned, I like how my car is sprung, I don't particularly care to have the rate go up a lot, which I understand it will with any coils. Here's my question: In the rear my car has a cup exhaust, no back seats, no subwoofer, and the rear is probably a good 60lbs lighter than stock. In the front I have no AWD, no spare or tools and a PC950 instead of the stock battery; the front of the car is about 150lbs lighter than stock. The C2, C4S and Turbo springs are all different (as the should be) due to the varying weight of the different sub-models, but since my car is closer in weight to a stock C2, especially with the AWD delete, rather than a stock 4S, wouldn't I be better off getting the C2 coils for my car? Has anyone else done this? Appreciate the input. Best, Kyle

POST 2 / ORIGINAL POSTEROriginal post

Ok, just got off the phone with Sam at EVO Motorsports and he told me that the knuckle on the 4 and 4s are in fact different (mounting point) due to normally having to have to avoid the front drive shaft and that C2 coils on a C4 would probably be bad news bears. Case closed, unless you switched your knuckles too.

This is a source reference. Confirm exact model applicability in the original material.