Karlyn STI® 634 - Spark Plug Wire Set

First impression was wow they are red and look very sport like. Went on way too a totally of 10mins to take off old plugs and put these bad boys on. Happy with the product and happier with the look. Adds color to the boring engine.

Wires perform perfectly fine. 2 complaints - for some reason, the blind placement of the wire on the plug was more difficult that the original. Required multiple tries. The other is that the rubber flange that covers the spark plug well does not lie tightly. There is a slight gap, which may allow dust and debris into the hole. Not sure if this is a deal breaker given the value of these and the difficulty in getting original parts nowadays.

Theses spark plug wires work great they hook right up with no trouble. They were all the perfect length too, so you don’t have to cut them. The blue wires also look very good in the engine bay.

I've only had them and some new plugs on for 2 days but i definitely noticed a power increase.

They look cool, work fine, but are not built correctly. The boots are slightly to long so the covers don't go all the way down. There is a gap between the cover and the valve cover, so water can get into the spark plug hole. That is the purpose of having that piece there, to seal that up. And no, you can't just trim a little off, because the part that snaps onto the plug is set down so far, it is the limiting factor. The wires are also to long, all of them. About a inch to long. Doesn't sound like much but these go through guides all the way and you have to figure out how to route the extra wire at the end somehow, without making it hit any metal. There is a lot of metal to hit, that's why the length is important. What I really don't get is how that can get screwed up. Didn't they take a stock Subaru set and check them before they built these?

Price is good but has some flaws. Length does not match original cables. Some are spot on but other are +-.5" so installation does not look as neat as with the OEM cables. The caps on the distributor side are slightly larger than OEM so the plastic cover over the distributor gets hard to fit. Cables ranged from 980 to 1123 ohms.

Product looks great, I love the sporty blue car ran smoother with performance and acceleration. I bought these wires because to replace old ones and also the design of these wires is a big factor due to how the distributor connections are made very well and have number clips on the wires themselves for installation! Definitely A+++ for quality design and performance!

Excellent fit, reasonable price and fast shipping. Definite five out of five.

Good quality for the price. Just installed coil and plug wires. Too soon to tell if any improvement on gas mileage. I have peace of mind that they have been charged.

They came early, good price. They work great, I love them!