Alright, I have a date that im going to the Iron Range in Gilbert MN. It's going to be the last weekend in June the 25,26, and 27. And now it's time for exhaust for the 400ex. It needs to be somewhat quiet. I was leaning towards the Sparks X-6. What do you guys think. I want a lot of power all the way through the powerband but more low to mid. I was looking at the Dirt Wheels Pipe Shootout. between the 10 they tested. I picked the ones with the most hp that are not incredibly loud.

Big Gun (standard) 15.4 hp 27.2 peak Hp 98db
Pro Circuit T-4 15.9 hp 27.4 peak hp 95db
White Brothers R4 15.1 hp 27.1 peak hp 97db
Yoshimura RS-3 15.5 hp 27.6 peak hp 95 db

Here's the rules
1.Must have Spark Arrestor
2.Under 100 decebels
3.Be able to order and have by June 25th

what do you guys/gals think. The time has come! Please Help

 

I'd go with White Bros. or Yoshimira. Order it from rockymountainatv. and you'll have it in 5 days or less.

 

Yoshimura comp series or Pro Series???

 

Do both the comp and Pro series have spark arresters?

 

I just checked rockymountainatv, the comp series has a spark arrester, the pro series does not. The full system (comp series) is $419.95 from rockymountainatv.com

 

You then must rejet your carb and get a different air filter. I have a uniflow on mine.

 

You need the Comp Series. It will be perfect for your limit's, and to get the best power from it...take your air box lid off, install a k&n filter and jet up.

 

id say go with the BIg Gun,great power,pretty loud but its under what you need,and it sounds fin great.

 

get a curtis sparks with the spark arrestor, is 549 but its worth every penny

 

Read his desires. He wants something fairly quiet. Both Sparks and Big Guns are LOUD. Why recommend something that he doesn't want?