Mack Superliner Truck Exhaust Parts

Frequently Asked Questions About Mack Superliner Truck Exhaust Parts

Will these exhaust stacks fit my specific year Mack Superliner, and what are the mounting requirements?

Most aftermarket exhaust stacks are designed to fit Mack Superliners from 1985-1993, though some universal options work with models through 2000. Check your existing stack diameter (typically 5" or 6") and measure the mounting bracket spacing on your air cleaner. Standard mounting uses either band clamps or bracket-style mounts. Pre-2000 models generally use a straight pipe connection, while some later models may require an elbow adapter. Always verify your truck's specific exhaust outlet configuration before ordering.

What's the difference between chrome and stainless steel stacks, and which holds up better?

Chrome-plated stacks offer a mirror finish but require regular polishing and can eventually pit or rust, especially in salt-heavy regions. 304 stainless steel stacks cost about 20-30% more but resist corrosion without constant maintenance. For trucks in northern climates or coastal areas, stainless is worth the investment. Chrome works well for show trucks or southern routes with minimal salt exposure. Both materials handle exhaust temperatures equally well, so the choice comes down to maintenance preference and operating environment.

Can I install these exhaust parts myself, and what tools will I need?

Yes, most exhaust stack installations take 2-4 hours with basic tools. You'll need: socket set (typically 9/16" and 5/8"), band clamp tool or large screwdriver, WD-40 for stubborn connections, and possibly a reciprocating saw if cutting old exhaust. The trickiest part is usually breaking loose old clamps without damaging flanges. Having a helper makes aligning heavy stacks much easier. Professional installation typically runs $150-300 if you prefer to have a shop handle it.

Do curved or mitered stacks affect engine performance compared to straight stacks?

The style difference (curved, mitered, or straight) has minimal impact on performance when using the same diameter pipe. What matters is maintaining consistent diameter throughout the system. Reducing from 6" to 5" or adding too many bends can create backpressure. Most Superliner engines perform well with either 5" or 6" exhaust, but turbocharged models benefit from 6" systems. Style choice is primarily aesthetic - curved stacks direct exhaust away from the cab, while straight stacks offer a classic look.

How do I stop exhaust stacks from discoloring or turning blue/gold at the tips?

Discoloration is normal from exhaust heat (800-1200?F) and doesn't indicate a problem. To minimize it: ensure your engine isn't running rich (black smoke), avoid extended idling when possible, and consider heat shields or wrapped stacks for the first 12-18 inches. Some drivers use high-temp clear coat on chrome stacks, though this requires reapplication. Stainless steel shows less discoloration than chrome. If appearance is critical, plan to polish chrome stacks monthly or choose stainless with a brushed finish that hides minor discoloration better.