Sport Roll Bar * 4-point * NO door bars * Fixed harness mount tube Special-Order Options: Diagonal Brace A welded-on diagonal brace is available with any MM roll bar for the S197 chassis. Located in the plane of the main hoop, the diagonal brace greatly improves rollover protection and increases chassis rigidity. A diagonal brace is an option available with any MM roll bar for the S197 chassis. Made from 1-3/4" diameter by 0.134" wall DOM tube. To order a Diagonal Brace, after adding your roll bar choice to the shopping cart, add the "Diagonal Brace Option", part # Mm5RBO-1, to your shopping cart: Click here. As special-order items, we do not stock roll bars with this option. Allow 2-4 weeks for manufacturing. Note: Any model roll bar that does not include high-mounted door bars and have a welded-in harness mount brace does not meet the NHRA or NMRA rules. NOTICE: Inaccurate shipping price will be displayed at checkout. You will not be charged the displayed amount. Our sales staff will contact you with the correct shipping amount prior to charging your credit card. Approximate range to a commercial address is $85 (CA) or $120-180 (out of CA).