8158730

KIT #8158730 2-1/2” Dual Exhaust Kit w/Turbo Mufflers

This kit fits E-body, 1970-1974 Challenger, Barracuda, all with V8, standard headers, and with 3” collectors at the headers. For those with 3-1/2” collectors, you will need to purchase an additional header collector kit.

NOTE: THE HEADERS ARE NOT INCLUDED IN THIS KIT!! We recommend use of Dynomax headers for this application. Modifications may need to be made for different styles of headers, including cutting and welding, or extra length pipes. For vehicles with 3-1/2” collectors, you will need to order a 3-1/2” header collector kit, part # 30006.

DANGER WARNING: SHOULD THE PURCHASER DECIDE TO INSTALL THIS EXHAUST PRODUCT AT HOME, BE WARNED THAT PLEASURE CAR OR LIGHT DUTY TRUCK/VAN “BUMPER” JACKS ARE INTENDED FOR EMERGENCY USE ONLY. THE USE OF FRAME CONTACT JACK STANDS IN CONJUNCTION WITH A FLOOR JACK AS MAIN SUPPORT IS HIGHLY RECOMMENDED TO MINIMIZE ACCIDENTAL DROPPING OF A VEHICLE WHILE THE INSTALLATION PROCEEDS.

HARDWARE KIT: PIPE KIT:

2) ST4 METAL HANGERS 1) LEFT FRONT EXTENSION PIPE--#8158731

2) SNAPPER GROMMETS 1) RIGHT FRONT EXTENSION PIPE--#8158732

2) HEADER COLLECTORS—3”-2-1/2” 1) LEFT REAR EXTENSION PIPE--#8158733

2) BR4 METAL HANGER BRACKET 1) RIGHT REAR EXTENSION PIPE--#8158734

12) 2-1/2” CLAMPS 2) LEFT AND RIGHT TURNDOWNS--#8158737

2) F33 FLANGES 1) RIGHT OVER THE AXLE PIPE--#8158736

6) 3/8” NUTS 2) #911 SINGLE OFFSET TURBO MUFFLERS

6) 3/8” LOCKWASHERS 1) LEFT OVER THE AXLE PIPE--#8158735

6) 3/8” X 1-1/4” BOLTS

6) 5/16” LOCK WASHERS

2) #MP48005 3” COLLECTOR GASKETS

4) 5/16” X 1” BOLTS

2) 5/16” X 1-1/2” BOLTS

6) 5/16” NUTS

2) ANGLE BRACKET HANGERS--#2825

2) BR104 RUBBER HANGERS

2) LAG SCREWS

2) FENDER WASHERS

KIT # 8158730 INSTALLATION INSTRUCTIONS:

NOTE: DO NOT TIGHTEN ANY CLAMPS OR NUTS UNTIL THE LAST STEP!!

1) RAISE THE AUTOMOBILE IN A SAFE AND SUITABLE MANNER--SUPPORT WITH JACK STANDS ONTO THE FRAME.

2) REMOVE THE OLD EXHAUST SYSTEM AFTER THE HEADERS. REMOVE THE OLD HANGERS. NEW UNIVERSAL HANGERS ARE INCLUDED IN THIS KIT TO REPLACE THE ORIGINAL HANGERS.

3) INSTALL THE COLLECTORS TO THE HEADERS USING THE MP48005 GASKETS AND F33 FLANGES, AND ENCLOSED 3/8” HARDWARE. TIGHTEN AT THIS TIME, USING THE 3/8” X 1-1/4” BOLTS, NUTS, AND LOCK WASHERS.

4) INSTALL THE I.D. ENDS OF THE LEFT (#8158731—2 BENDS) AND RIGHT (#8158732—1 BEND) FRONT EXTENSION PIPES TO THE COLLECTORS USING 2-1/2” CLAMPS. BE SURE TO LEAVE ADEQUATE CLEARANCE BETWEEN THE FLOOR BOARDS, THE DRIVE SHAFT, AND THE CROSSMEMBER. NOTE: IF THESE PIPES DO NOT FIT YOUR HEADERS, YOU MAY NEED TO MODIFY AS NECESSARY (CUT AND WELD) FOR FIT. THESE KITS WERE DESIGNED FOR USE WITH DYNOMAX HEADERS.

5) INSTALL THE I.D. ENDS OF THE LEFT (#8158733—2 BENDS) AND RIGHT (#8158734—3 BENDS) REAR EXTENSION PIPES TO THE LEFT AND RIGHT FRONT EXTENSION PIPES, USING 2-1/2” CLAMPS.

6) ON THE PASSENGER SIDE OF THE EXHAUST, YOU WILL NEED TO INSTALL THE ST4 METAL HANGER TO THE O.E. MOUNTING HOLE ABOVE USING A 5/16” X 1-1/2” BOLT, NUT, LOCK WASHER AND SNAPPER GROMMET, ON CERTAIN MODELS THE END WITH THE LARGE HOLE OF THE HANGER MAY NEED TO BE BENT AT A 90 DEGREE ANGLE TO MOUNT PROPERLY. INSTALL THE BR4 BRACKET TO THE ST4 METAL HANGER USING A 5/16” X 1 BOLT, NUT, LOCK WASHER. REPEAT FOR THE DRIVER’S SIDE, IF YOU HAVE THE FACTORY DUAL EXHAUST AND THE O.E. HANGER MOUNTING HOLE, YOU WILL NEED TO BEND THE HANGER AS BEFORE. IF YOU HAVE FACTORY SINGLE EXHAUST AND NO DRIVER’S SIDE O.E. MOUNTING HOLE, USE THE ST4 HANGER AS IT IS AND MOUNT TO THE CROSS MEMBER ABOVE, NEAR THE SAME TYPE OF LOCATION ON THE OPPOSITE SIDE, YOU WILL NEED TO DRILL A 5/16” HOLE. REPEAT THE REST FOR THE BRACKET USING THE APPROPRIATE HARDWARE.

7) INSTALL THE LEFT (#8158735) AND RIGHT (#8158736) OVER THE AXLE PIPES TO THE REAR EXTENSION PIPES USING 2-1/2” CLAMPS. USE 2-1/2” CLAMPS TO CONNECT THE OVER THE AXLE PIPES TO THE BR4 BRACKETS ABOVE.

8) INSTALL THE MUFFLERS (OFFSET IN, TOWARDS DRIVE SHAFT/CENTER OUT) ONTO THE REAR EXTENSION PIPES USING 2-1/2” CLAMPS. ROTATE THE PIPES FOR GENERAL CLEARANCE.

9) MOUNT THE ANGLE BRACKET HANGERS TO THE FRAME AT THE O.E. HOLE FOR THE HANGER IN THE FRAME AT THE REAR, USING THE ORIGINAL BOLTS, OR A LAG SCREW. IF YOU HAD FACTORY SINGLE EXHAUST AND NO O.E. HANGER AT THE REAR ON THE DRIVER’S SIDE, YOU WILL NEED TO DRILL A HOLE IN THE FRAME IN APPROXIMATELY THE SAME LOCATION AS THAT ON THE PASSENGER SIDE. ATTACH A BR104 HANGER TO THIS ANGLE BRACKET HANGER FOR BOTH SIDES USING 5/16” X 1” BOLTS, LOCK WASHERS, NUTS, AND FENDER WASHERS.

10) INSTALL THE LEFT AND RIGHT (#8158737) TURNDOWNS TO THE MUFFLERS USING 2-1/2” CLAMPS. CONNECT THESE CLAMPS TO THE BR104 HANGER THAT WAS MOUNTED IN STEP 9).

11) MAKE SURE THAT ALL THE PARTS OF THE SYSTEM ARE CLEAR OF FRAME MEMBERS, THE CROSS MEMBER, DRIVESHAFT, FLOOR, ALL HOSES, SUSPENSION, AND BRAKE AND FUEL LINES. STARTING AT THE COLLECTOR PIPES, TIGHTEN ALL CONNECTIONS AND NUTS. MAKE SURE ALL PARTS ARE CLEAR AND WILL NOT LEAK OR RATTLE. AFTER SEVERAL DAYS OF DRIVING RETIGHTEN ALL BOLTS.

LIMITATION OF LIABILITY-DISCLAIMERS: THE REGULATION OF EMISSIONS PRODUCTION, NOISE LEVELS AND SAFETY STANDARDS IS UNDERTAKEN BY THE FEDERAL GOVERNMENT, EACH OF THE FIFTY STATE LEGISLATURES, AND BY MANY LOCAL MUNICIPALITIES, TOWNS AND COUNTIES.

THE MANUFACTURER MAKES NO WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE, OR THAT ITS PRODUCTS ARE APPROVED FOR GENERAL USE, OR THAT ITS PRODUCTS COMPLY WITH LAWS, REGULATIONS OR ORDINANCES IN THE STATES WHERE THEY MAY BE SOLD TO THE ULTIMATE PURCHASER, THE CONSUMER.

THE ENTIRE RISK AS TO THE CONFORMITY OF THIS PRODUCT IN ANY SUCH STATE AND AS TO REPAIR, SHOULD THE PRODUCT PROVE TO BE DEFECTIVE OR NON-CONFORMING, IS ON THE RETAIL PURCHASER, THE BUYER, THE ULTIMATE CONSUMER, OF SUCH PRODUCT AND IT IS NOT UPON THE SELLER, DISTRIBUTOR, OR MANUFACTURER.

IN THIS CONNECTION, THE RETAIL PURCHASER, THE BUYER, THE ULTIMATE CONSUMER ASSUMES THE BURDEN OF THE ENTIRE COST OF ANY AND ALL NECESSARY SERVICE, ALTERATIONS AND OR REPAIR.

THE FOREGOING STATEMENT LIMITS THE LIABILITY OF THE MANUFACTURER.

CALIFORNIA VEHICLE CODE SECTION 27156 PROHIBITS THE ADVERTISING, OFFERING FOR SALE, OR INSTALLATION OF ANY DEVICE WHICH MODIFIES A VEHICLE’S EMISSION CONTROL SYSTEM. THIS PRODUCT IS THEREFORE NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON VEHICLES EQUIPPED WITH CATALYTIC CONVERTERS.