The aFe SATURN 4S 4 in. polished tip is a single-walled, slash-cut stainless steel exhaust tip with a 4 in. inlet, 5 in. outlet, and 12 in. overall length. The tip comes with intercooling vents and a unique laser-cut aFe Power logo plate riveted on for an aggressive style. The manufacturer says the vents are designed to lower exhaust gas temperatures at the tailpipe, which is the practical reason to pay more than for a plain tip. The high-luster finish holds up better than a painted or powder-coated tip when exposed to road grime and heat.
Fitment comes down to matching the inlet to your tailpipe. The manufacturer states the tip is designed to fit 4" exhaust systems, so measure your tailpipe's outer diameter before ordering. For DIY installers, the tip uses a high quality stainless steel band clamp that is meant to provide a complete seal around the tailpipe. Searches for 4 inch to 5 inch stainless intercooled exhaust tip, polished aFe slash cut tip, and aFe SATURN 4S tailpipe tip for diesel trucks tend to point to this exact part.
The manufacturer designs this tip for 4 in. exhaust systems, so the tailpipe outer diameter should match the 4 in. inlet. Measure your tailpipe before ordering and confirm fitment with the manufacturer if your exhaust is an unusual size.
No. The polished version is listed under part number 49T40501-P122, and the manufacturer lists the black finish under a separate part number, 49T40501-B122.
The manufacturer says the intercooling vents are designed to reduce exhaust gas temperatures at the tailpipe. It does not list a measured temperature reduction.
This is a straightforward bolt-on or clamp-on job for most DIY installers. General tip installation guides estimate about 10 to 15 minutes with basic hand tools, including a tape measure to verify the tailpipe diameter, a socket or Allen wrench for the band clamp, and rubbing alcohol to clean grease and carbon from the tailpipe before fitting. Slide the tip on, align the aFe logo and the slash cut, and tighten the clamp until the tip will not rotate by hand. Avoid overtightening, which can strip the clamp or distort the inlet. Vehicle-specific details can vary by application, so confirm the mounting method with the manufacturer before starting.
